The British Prime Minister Boris Johnson has been referred to a police watchdog, in connection with allegations a businesswoman received favourable treatment when he was the Mayor of London.

The UK's Independent Office for Police Conduct (IOPC) has been asked to assess whether he should be investigated for the criminal offence of misconduct in public office.

In a statement, the Greater London Authority (GLA) said a "conduct matter" had been recorded against Mr Johnson over claims that Jennifer Arcuri received public money and privileged access to foreign trade missions while he was mayor.

The GLA added: "A 'conduct matter' exists where there is information that indicates that a criminal offence may have been committed.

"It does not mean that this is proved in any way. The IOPC will now consider if it is necessary for the matter to be investigated."

The matter has been referred to the IOPC, which handles complaints against police forces in England and Wales, because Mr Johnson held a post equivalent to a police and crime commissioner.

Mr Johnson denies any wrongdoing.

He has previously said that he will co-operate with any investigation into his links with Ms Arcuri.