Police have released CCTV stills of 17 men they want to trace in relation to the violence which erupted at a Free Tommy Robinson protest four months ago.

Hundreds of supporters of the former leader of the English Defence League and far-right activist descended on Whitehall in central London on June 9.

Nine arrests were made and several people were injured at the protest including five officers.

Police have released these pictures off 17 men they want to trace in relation to the violence which erupted at a Free Tommy Robinson protest four months ago

Some of Robinson's supporters threw bottles, metal barriers and traffic cones at police

Some of Robinson's supporters threw bottles, metal barriers and traffic cones at police.

Detective Constable Jonny Wise said: 'During this demonstration violent disorder broke out on the streets of central London, resulting in injuries to members of the public and numerous police officers.

'A post-incident investigation was launched, through which we have already identified a number of suspects as the result of a public appeal.

'We are incredibly grateful to the public for their help identifying individuals so far, and we are now issuing a further appeal for assistance in identifying the people in these images.'

Police blocked the road around Trafalgar Square during the protest.

It was was one of a number held in support of Robinson, who was jailed for contempt of court for using social media to broadcast details of a trial which is subject to blanket reporting restrictions.

Leeds Crown Court heard how he filmed himself and people involved in the case, in footage that was watched around 250,000 times within hours of being posted on Facebook.

Robinson, whose real name is Stephen Christopher Yaxley-Lennon, was sentenced to 13 months in jail on the same day as his arrest.

He was given 10 months in jail for contempt of court, and an additional three months for beaching a previous suspended sentence.

A police medic (left) suffered a nasty gash on his face after some of Tommy Robinson's (right) supporters clashed with officers

Robinson was later freed from prison after three leading judges quashed the contempt of court finding made at Leeds Crown Court.

The appeal court heard the hearing in which he was jailed was 'muddled' and 'rushed' and held five hours after his arrest.

Last month, a fresh contempt of court case against Robinson was adjourned by a judge at the Old Bailey.