Information Commissioner Elizabeth Denham said:

“We can confirm that we have received a referral from the Metropolitan Police Service (MPS) that explains their belief that offences under the Data Protection Act 1998 have been committed by former MPS officers.

“As the UK’s data protection regulator, we’ll be looking at whether individuals acted unlawfully by retaining or disclosing personal data.

“These are serious allegations and we are investigating to determine whether the law has been broken and what further action is necessary including potential criminal prosecution.”