A new postmortem examination on the body of Ian Tomlinson, who died after being hit by a policeman at last year’s G20 protests, has been kept from the authorities.

The examination – the third carried out on the newspaper seller – was made on behalf of Carshalton police constable Simon Harwood, who was filmed striking Mr Tomlinson with his baton and pushing him to the ground during the protest on April 1.

But the results have been withheld from the Crown Prosecution Service (CPS) and Independent Police Complaints Commission because the test is classified as defence material.

Keir Starmer, CPS director of public prosecutions, has already said there will be no criminal proceedings over Mr Tomlinson’s death – a decision described as “outrageous” by Mr Tomlinson’s stepson Paul King.

Freddy Patel, who carried out the first examination for Mr Tomlinson’s inquest, said the 47-year-old had died of a heart attack.

He has since been suspended from practice for three months by the General Medical Council after being found guilty of misconduct in three earlier autopsy cases.

A second autopsy suggested Mr Tomlinson died from internal bleeding.