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13 July 2023 - We have included the following new examples from Tribunal’s decisions and ICO’s decision notices:

  • IC-95382-F2Z3
  • FS50794284
  • Boyce v IC and PHSO EA/2019/0032
  • Robin Callender Smith v IC and CPS [2022] UKUT 60 (AAC)

About this detailed guidance 

This guidance explains to public authorities the main provisions of section 42, the exemption for legal professional privilege (LPP), and how to apply it. Read it if you have questions not answered in the Guide, or if you need as deeper understanding to help you apply this exemption in practice. 

In detail 

What exemptions are contained in section 42 of FOIA?

Section 42 states that:

(1) Information in respect of which a claim to legal professional privilege or, in Scotland, to confidentiality of communications could be maintained in legal proceedings is exempt information.

(2) The duty to confirm or deny does not arise if, or to the extent that, compliance with section 1(1)(a) would involve the disclosure of any information (whether or not already recorded) in respect of which such a claim could be maintained in legal proceedings.

Both exemptions are subject to the public interest test.

What does ‘legal professional privilege’ mean? 

The client’s ability to speak freely and frankly with their legal adviser to obtain appropriate legal advice is a fundamental requirement of the English legal system. The concept of legal professional privilege (LPP) protects the confidentiality of communications between a lawyer and client. This helps to ensure complete fairness in legal proceedings.

For the purpose of this guidance, the generic term ‘lawyer’ means a legal adviser acting in a professional capacity and includes legal executives.


In Bellamy v the Information Commissioner and the Secretary of State for Trade and Industry (EA/2005/0023, 4 April 2006) (Bellamy) the Information Tribunal described LPP as:

“...a set of rules or principles which are designed to protect the confidentiality of legal or legally related communications and exchanges between the client and his, her or its lawyers, as well as exchanges which contain or refer to legal advice which might be imparted to the client, and even exchanges between the clients and [third] parties if such communications or exchanges come into being for the purposes of preparing for litigation”.

What types of legal professional privilege are there?

In the Bellamy decision, the Tribunal acknowledged that there are two types of privilege within the concept of LPP:

  • litigation privilege; and,
  • advice privilege.

Litigation privilege

Litigation privilege applies to confidential communications made for the purpose of providing or obtaining legal advice about proposed or contemplated litigation. There must be ongoing litigation or a real prospect or likelihood of litigation, rather than just a fear or possibility. For information to be covered by litigation privilege, it must have been created for the dominant (main) purpose of giving or obtaining legal advice, or for lawyers to use in preparing a case for litigation. It can cover communications between lawyers and third parties so long as they are made for the purposes of the litigation.

Litigation privilege can apply to a wide variety of information, including advice, correspondence, notes, evidence or reports.

Advice privilege

Advice privilege applies where no litigation is in progress or contemplated. It covers confidential communications between the client and lawyer, made for the dominant (main) purpose of seeking or giving legal advice.

The legal adviser must have given advice in a legal context; for instance, it could be about legal rights, liabilities, obligations or remedies. Advice from a lawyer about financial matters or on an operational or strategic issue is unlikely to be privileged, unless it also covers legal concerns such as advice on legal remedies to a problem.


Three Rivers District Council and others v Governor and Company of the Bank of England [2004] UKHL 48:

In this appeal, the House of Lords found that advice by the Bank of England’s lawyers as to how best to present evidence to the Bingham Inquiry on the collapse of the Bank of Credit and Commerce International (BCCI) was covered by LPP, even though the inquiry was not a legal process. This was because the advice had a legal function; it was about whether the bank had properly discharged its functions under banking laws and about the potential public law remedies for challenging any unfavourable findings.

Who is the legal adviser and who is the client?

For public authorities to determine whether LPP applies, they first need to be clear who the parties to the confidential communication are.

Who is the client?

Communications with third parties are not covered by advice privilege and are only covered by litigation privilege if they have been made for the purposes of the litigation, so it is important to determine who the lawyer’s client is.

This will depend on the facts of the case. For instance, all the authority’s employees in a particular department might be considered the client of a lawyer, whereas the authority’s remaining staff might be considered third parties.


In a separate appeal about BCCI, Three Rivers District Council & Ors v The Governor & Company of the Bank of England (No.5) [2003] EWCA Civ 474, the Court of Appeal considered who was the client and therefore which correspondence was covered by LPP. In this case, the Court found that the client was the very small team of employees set up specifically to deal with the Bingham Inquiry, rather than the whole bank. Therefore, correspondence between lawyers and other bank employees was not covered by LPP.

Who is the legal adviser?

For public authorities, establishing who is the legal adviser will be key to them identifying when a communication is legally privileged.

In Calland v Information Commissioner & the Financial Services Authority (EA/2007/0136, 8 August 2008) the Tribunal confirmed that legal advice and communications between in-house lawyers and external solicitors or barristers also attract LPP.

What are ‘communications’ under section 42?

A communication under section 42 means a document that conveys information. It could take any form, including a letter, report, email, memo, photograph, note of a conversation, or an audio or visual recording. A document does not actually need to be sent for it to count as a communication for this purpose; a document that has been prepared to convey information, but is still on its creator’s file, is still a communication. Communications might include draft documents prepared with the intention of putting them before a legal adviser, even if they are never sent to the adviser. An example might be a witness statement that was prepared, but not actually sent to a lawyer.

Enclosures and attachments to a communication, and pre-existing documents

Any enclosures or attachments to a communication are usually only covered by LPP if they were created with the intention of seeking advice or for use in litigation. The authority must consider each document individually.

If an enclosure existed before litigation was contemplated or before it was considered possible that legal advice might be needed, LPP will not usually apply to it. There is, however, one important exception to this rule. When a lawyer uses their skill and judgement to select pre-existing documents that weren’t already held by the client, for the purposes of advising their client or preparing for litigation, then LPP can apply.


This example concerns instructions sent to a lawyer to ask for advice about liability and quantum (amount of damages) following a road traffic accident. The table below indicates which documents will be subject to LPP.

Example enclosure Privileged Not privileged
(a) Car service records   (a) (b) and (c) are not covered by LPP. They existed before the accident so were not created for use in litigation. They are documents that were already held by the client, which the lawyer selected using their skill and judgement for the purposes of litigation.
(b) MOT   see (a) above
(c) GP’s medical records   see (a) above
(d) Medical expert’s report on injuries sustained (d) and (e) are covered by LPP (created by third parties when litigation was contemplated, for use in the litigation)  
(e) Witness statements sent from independent witnesses see (d) above  

(f) Photo of scene of accident taken by client

(f) is covered by LPP (created for use in prospective litigation)  
(g) Police accident report   (g) not covered by LPP (created by police to investigate the accident)
(h) Correspondence between parties to the litigation (h) could be covered by LPP for the purposes of FOIA (documents created for the purpose of prospective litigation) – unless in the public domain (see ‘loss of LPP’ below)  

The lawyer responds to the instructions, advising how to proceed and enclosing decided legal cases that they propose to rely on to support a particular line of legal reasoning. These enclosures weren’t already held by the client, and the lawyer  has selected them using their skill and judgement. They are therefore covered by LPP.

Does legal professional privilege apply to communications relating to crime?

LPP does not cover communications that would enable a client to commit crime. This applies whether or not the lawyer is aware of the wrongdoing.

However, LPP does normally still apply to legal advice given after a crime has been committed.

Can legal professional privilege be lost and is ‘waiver’ relevant to disclosures under FOIA?

Once you have established that the requested information falls within the definition of LPP, the next question that often arises is whether privilege has been lost or waived because of earlier disclosures.

Waiver is a term that describes disclosures made to a legal opponent within the context of specific court proceedings. Privilege over information can be waived in a particular court case but still retained for the same information in other contexts and indeed in other court proceedings. In this context, ‘cherry picking’ (ie, revealing only part of the advice given) isn’t permitted. However, arguments about waiver and cherry picking have no relevance in the context of considering disclosure of information under FOIA. This is because under FOIA we are concerned with disclosures to the world at large rather than disclosures to a limited audience. 

In an FOI context, LPP will only have been lost if there has been a previous disclosure to the world at large and the information can therefore no longer be considered confidential.

We recommend that you avoid referring to or thinking about whether privilege has previously been waived, and instead focus on the key question of whether privilege has been lost because previous disclosures to the world at large mean the information can no longer be considered confidential.

To assess this question, you must investigate whether or not the disclosure has been made in a restricted or an unrestricted way. This guidance considers these concepts, both within and outside the context of litigation.

Unrestricted disclosure

Unrestricted disclosure refers to a disclosure of information made to the world at large or without any restriction on its future use. This would mean it could enter the public domain. As a result, the original holder or owner of the legal advice can no longer expect it to remain confidential. An unrestricted disclosure can be made within or outside the context of litigation. Where confidentiality is lost, you cannot claim that section 42 applies.

A disclosure of information in open court is an unrestricted disclosure. That information has lost its quality of confidence and is no longer protected by privilege. If there is any doubt as to whether information was or was not disclosed in open court, the Information Commissioner will usually consider documents to have lost confidentiality when a judge has allowed disclosure on an unrestricted basis. However, it is only the information actually disclosed in open court that will lose its LPP protection for FOI purposes; so any residual information (that has only been disclosed to the court and the opponent) will still be protected.

Information disclosed in open court does not automatically remain in the public domain indefinitely. However, as a result, the client has effectively lost control over the information, so it is unlikely to have the necessary quality of confidence.

If legal advice is disclosed outside litigation without any restrictions, it is no longer confidential so is no longer protected by LPP. If only part of the advice is disclosed outside litigation without restrictions, it is possible for the remaining information to keep its LPP protection, depending on how much the disclosed information revealed about it. If the disclosure did not reveal the content or substance of the remaining information, then the remaining part will keep its quality of confidentiality. Therefore, a brief reference to or summary of the legal advice that does not reveal its substance is unlikely to lead to a loss of privilege.


This point was illustrated in Mersey Tunnel Users' Association (MTUA) v Information Commissioner and Merseytravel (EA/2007/0052). The public authority had earlier obtained legal advice on how to spend revenue, and had referred to it when dealing with the MTUA. The Tribunal found that: “None of the references … reveal the full advice, or anything approaching that, or quote directly from it” and that the disclosed information did not reveal “…the reasoning behind the legal advice or the other options considered”.

Restricted disclosure

Restricted disclosure means a disclosure of information to a limited audience, with restrictions on its further use; for example, a disclosure made on a confidential basis. The information would therefore remain confidential from the world at large, thus retaining its legally privileged status. As above, a restricted disclosure may be made inside or outside the litigation context.

Making a disclosure only to a party’s opponent and to the court is an example of a restricted disclosure in the litigation context. In litigation, the parties have to disclose the information they intend to rely on in court to their opponent and to the court. Disclosures made only to the court and to an opponent are ‘restricted disclosures’, which remain confidential from the rest of the world, unless the information is later disclosed in open court. Since these disclosures do not enter the public domain, they may continue to be protected by LPP for the purposes of FOIA.

Outside litigation, making a disclosure to a business partner might be a restricted disclosure.

Is intention relevant?

The fact that an authority or one of its staff did not intend to relinquish its right to claim LPP is irrelevant. For example, an employee of the public authority relies on legal advice the authority has received, and reveals its substance when speaking in public. As a result, the information can no longer be regarded as confidential, and the public authority would not be able to claim LPP. This would be the case even if the officer did not understand the effect of their actions.

If an authority inadvertently discloses information to a limited audience (for example by enclosing the wrong documents with a covering letter), it may be possible to get it returned and to reassert the original confidentiality and LPP. However, this is unlikely to be possible if a disclosure is made into the public domain, which is the key issue under FOIA.

Can a lawyer’s selection of documents be covered by LPP, even if the documents selected are publicly available from elsewhere?

There is one exception to the general rule that publicly available information cannot attract privilege because it is not confidential. This applies when LPP is claimed for documents which the lawyer has used their skill and judgement to select and which would indicate the trend of the legal advice given or the trend of litigation arguments. In this case, privilege can be claimed for the selected documents even if they were publicly available, because disclosing them would reveal the substance of the advice given.

The same protection is not available for the selection of documents sent by a client to a legal adviser, however, and LPP cannot apply if the selection of documents is made from documents already held by the client.

What about documents marked ‘without prejudice’?

The term ‘without prejudice’ is often marked on correspondence as part of negotiations on a settlement. Public authorities should not take this as meaning that LPP applies. This marking means that the information is privileged under the Civil Procedure Rules, but does not necessarily mean that it is privileged under section 42 of FOIA.

Do we need to demonstrate prejudice or adverse effect?

There is no requirement to demonstrate any prejudice or adverse effect when applying section 42, since it is not a prejudice-based exemption: ie, there is no need to show that any harm would occur from disclosure of the information. However, arguments about prejudice and harm are relevant when considering the public interest test.

Is there an exemption to the duty to confirm or deny?

Section 1(1)(a) FOIA requires you to confirm or deny whether or not you hold information. Section 42(2) removes the duty to confirm or deny, if to do so would involve disclosing any legally privileged information.

LPP protects the confidentiality of communications between a client and their legal adviser, but what it specifically protects is the substance of those communications. This interpretation is supported by the comment of Mr Justice Mann in USP Strategies v London General Holdings Ltd [2004] EWHC 373 (Ch), that: “The proper analysis, consistent with Three Rivers, is to continue to afford privilege to material which evidences or reveals the substance of legal advice” (paragraph 20). The fact of whether you have sought or received legal advice is not itself legally privileged, unless disclosing that fact would reveal the substance of those communications.

This means you can only refuse to confirm or deny whether you hold information about legal advice that you have sought or received if to do so would itself reveal something about the substance of that advice. ‘Substance’ means the content, rather than simply the general subject of the advice.  This is shown in the following hypothetical examples:

Example: section 42(2) may apply Example: section 42(2) does not apply

Mrs Brown asks Borsetshire County Council for “a copy of any legal advice you have obtained that would allow you to sell the kitchens of Borset High School to a private catering company”.

The council has obtained legal advice on the subject of selling off school kitchens to a private supplier, who would then provide school dinners to the pupils. The advice confirms that it is legally permissible to sell some kitchens, including those of Borset High School. The council holds a copy of the requested information.

The advice is covered by LPP and is exempt under s42(1). 

For the council to confirm or deny whether it holds the information requested would reveal the content of the legal advice. The council might therefore be able to cite section 42(2), but it must first apply the public interest test.

Mrs Brown asks Borsetshire County Council for “a copy of any legal advice you have obtained about selling the kitchens of Borset High School to a private catering company”.

The council has obtained legal advice on the subject of selling off school kitchens to a private supplier. 

For the council to simply confirm that it holds advice about selling the High School kitchens to a private company would not reveal the content of that advice.

Since confirming or denying would not disclose any legally privileged information, the council cannot use section 42(2).


Decision Notice IC-95382-F2Z3 involved a request to the Cabinet Office for the legal advice it received on the lawfulness of the Prime Minister’s lockdown declaration of 23 March 2020. The Cabinet Office refused to confirm or deny whether the requested information was held under section 42(2) FOIA. The Commissioner decided that: 

“In the Commissioner’s view, the Cabinet Office has failed to interpret the request properly as it has failed to distinguish between a request seeking legal advice on whether a particular action is “lawful” and one seeking legal advice on the “lawfulness” of a particular action. Those two words may be similar, but they are not the same. 

“[The word] “Lawfulness” implies a spectrum of different positions ranging from actions that will always be lawful to actions that will never be lawful. In between there will be a whole range of nuances reflecting the particular circumstances or particular processes that have been or must be followed for an activity to be lawful. However what’s important is that it is not a binary distinction.

“The Commissioner is therefore of the view that the Cabinet Office could confirm that it had sought legal advice (if it had in fact done so) without indicating whether that advice had concluded that the proposed action was or was not lawful. Therefore the Cabinet Office could confirm or deny that it had sought legal advice without revealing the substance of any advice provided and thus without revealing any information which would be covered by legal privilege.”

Even if you cannot claim section 42(2), you may still consider that to disclose whether or not you have received legal advice would cause some harm or prejudice, for example to the exercise of your statutory functions, to commercial interests or more generally to the conduct of public affairs. In that case you should decide exactly what harm or prejudice you envisage, and then consider whether the neither confirm nor deny provisions in a different exemption may apply.

You can only use section 42(2) if there is some information that is legally privileged. The exemption refers to information “whether or not already recorded”, but it still only applies if there is some legally privileged information to disclose. If you have not sought or obtained legal advice on the issue that is the subject of the request, then you cannot use section 42(2), because to confirm or deny would not involve the disclosure of legally privileged information.

However, there may be a situation in which you have not obtained the specific advice requested, but you have obtained some advice on the issue in question. In that case, depending on the circumstances, it may be possible to apply section 42(2), even though you do not hold the requested information.

Therefore, the key question is whether confirming or denying that information is held would disclose any legally privileged information. If it would, then you must still carry out the public interest test to decide whether to refuse to confirm or deny.

Further advice on neither confirm nor deny provisions in FOIA is available in our guidance document on When to refuse to confirm or deny  information is held.

How do we carry out the public interest test in relation to section 42 FOIA?

Once you have established that s42(1) or s42(2) is engaged, you then need to apply the public interest test (PIT). Please also refer to our separate guidance on the public interest test

You must consider whether the public interest in maintaining the exemption outweighs the public interest in disclosure. The general public interest inherent in this exemption will always be strong due to the importance of the principle behind LPP: safeguarding openness in all communications between client and lawyer to ensure access to full and frank legal advice, which in turn is fundamental to the administration of justice.

The following Tribunal decisions help to illustrate how to apply the PIT.


In Crawford v Information Commissioner & Lincolnshire County Council EA/2011/0145 the Tribunal stated:

“Our starting point, therefore, is that the exemption is qualified, not absolute, but that Mrs Crawford must show clear, compelling and specific justification that at least equals the public interest in protecting the information in dispute… ” and it concluded: “In the circumstances Mrs Crawford has not persuaded us that the factors she relies on give rise to a public interest that equals or outweighs the public interest in maintaining the section 42 exemption.”



The Tribunal explained the balance of factors to consider when assessing the PIT in Bellamy: “There is a strong element of public interest inbuilt into the privilege itself. At least equally strong countervailing considerations would need to be adduced to override that inbuilt public interest.”

Note that the Tribunal stated above that the “countervailing considerations” must be “strong”, rather than indicating that they should be exceptional.


In Boyce v IC and PHSO EA/2019/0032 it was confirmed that the public interest in disclosure does not need to be exceptional:

“In our view every case must be considered on its own merits, and it would be an error to seek to limit the application of the public interest test in relation to LPP material so as to give rise to a presumption that only in very exceptional cases would the public interest be in favour of disclosure.” [89] 



In Calland v Information Commissioner & the Financial Services Authority EA/2007/0136, the Tribunal commented: 

“The general public interest in disclosure of communications within public authorities has been referred to, usually under the headings of “transparency” and “informing the public debate”, in a number of decisions of this Tribunal. What is quite plain, from a series of decisions beginning with Bellamy v IC EA/2005/0023, is that some clear, compelling and specific justification for disclosure must be shown, so as to outweigh the obvious interest in protecting communications between lawyer and client, which the client supposes to be confidential.”



In Szucs v Information Commissioner EA/2011/0072 the Tribunal upheld the Information Commissioner’s decision that requested information was covered by LPP and that the public authority had correctly applied section 42(1) to it. The information was legal advice that the authority had commissioned about request handling. The Tribunal approved the Information Commissioner’s view that the fact the advice was still live carried significant weight.

Factors to consider when applying the PIT in section 42

Factor in favour of maintaining the exemption Factor in favour of disclosure
The concept of LPP and the rationale behind the concept (ie, ensuring frankness between lawyer and client, which serves the wider administration of justice etc). The assumption in favour of disclosure and the rationale behind the assumption (ie, accountability, transparency, furthering public debate etc). 

Additional weight may be added to the above factor if the advice is:

  • recent;
  • live;
  • protects the rights of individuals.

Additional weight may be added to the above factor if the following issues are relevant in the particular case:

  • Large amount of money involved.
  • Large number of people affected.
  • Lack of transparency in the public authority’s actions.
  • Misrepresentation of  the advice that was given.
  • Selective disclosure of only part of the advice that was given.


In Robin Callender Smith v IC and CPS [2003] UKUT 60 (AAC), the Upper Tribunal determined:

“...that the inherent weight afforded to non-disclosure of LPP material alone may outweigh the pro-disclosure factors”. In this case, “The fact that the CPS did not prove any prejudice, chilling effect or other factor against disclosure, did not mean that the inherent weight should not sit on the scales “in any event”.” 

It is also important to take into account the significance of the actual information and what it reveals.


The Tribunal’s deliberations in its decision in Mersey Tunnel Users’ Association v Information Commissioner and Merseytravel illustrate how it applied the PIT factors:

“Finally, we come to strike the balance in the particular circumstances of this case. Weighed in the round, and considering all the aspects discussed above, we are not persuaded that the public interest in maintaining the exemption is as weighty as in the other cases considered by the Tribunal; and in the opposing scales, the factors that favour disclosure are not just equally weighty, they are heavier. We find, listing just the more important factors, that considering the amounts of money involved and numbers of people affected, the passage of time, the absence of litigation, and crucially the lack of transparency in the authority’s actions and reasons, that the public interest in disclosing the information clearly outweighs the strong public interest in maintaining the exemption, which is all the stronger in this case because the opinion is still live… The opinion should be disclosed.”

The following Decision Notice helps to illustrate how the balancing exercise was conducted in which the Commissioner determined that the public interest in favour of maintaining the section 42 exemption was outweighed by the public interest in disclosure:


In FS50794284 the GMC withheld legal advice regarding its decision to appeal a Medical Practitioners Tribunal (MPT) decision in a particular case. The Commissioner decided that [38]:

“The Commissioner considers that this case has attracted substantial public interest. Whilst at the time of the request the matter had concluded and the GMC had confirmed it wouldn’t appeal, she does accept that whilst the case was no longer live the matter was still recent. Whilst she accepts that the GMC does not appear to have attributed ‘blame’ as such to the external legal advice, the previous Chair did indicate that the GMC’s decision was based upon the external legal advice it has received. Whilst the advice appears to have been followed in this case, given the widespread condemnation of the GMC’s decision, this does strengthen the public interest in understanding why and how that decision was reached.”

Further reading

This guidance deals only with the exemption for legal professional privilege under FOIA. The equivalent exception under the EIR is regulation 12(5)(b); please refer to the ICO’s separate guidance: 

The course of justice and inquiries exception (regulation 12(5)(b)) 

Additional guidance is also available, if you need further information: