A police officer has requested a third post-mortem examination of the man who died during the G20 protests, it was reported.

The City of London coroner confirmed that he has received a request for a further test after two previous pathologists disagreed over the cause of Ian Tomlinson's death.

Coroner Paul Matthews has not yet agreed but his decision is expected within a few days.

A spokesman for the Metropolitan Police said the force had "no knowledge" of such a request.

Newspaper seller Ian Tomlinson died on April 1 after a confrontation with officers in the City of London as thousands of protesters converged on the area. Peter Smyth, chairman of the Metropolitan Police Federation, said the request had not come from them.

"It's certainly not from us. I'm not surprised someone has asked for a third one.

"You can see there would be more than one interested party, but it's not the Police Federation."

A spokesman for the Independent Police Complaints Commission (IPCC) said: "The IPCC understands that a request has been made for a third post-mortem. This is a matter for the coroner."

The first examination found that Mr Tomlinson died of a heart attack but a second test, carried out at the request of the 47-year-old's family, found he suffered an "internal haemorrhage".

A police constable was suspended after video footage emerged of him hitting Mr Tomlinson with his baton before pushing him to the ground. Following the second post-mortem examination, he was interviewed under caution for manslaughter Dr Nat Cary carried out the second test and rejected the conclusion of the first pathologist Dr Freddy Patel that Mr Tomlinson died from coronary artery disease.