The 28-year-old complained this afternoon he merely 'brushed' the Prime Minister only to be 'assaulted by half a dozen coppers in suits'.
The Metropolitan Police Specialist Protection Command and West Yorkshire Police will conduct a review of the 'incident', Scotland Yard said.
A spokesman said: 'The Metropolitan Police Service is aware of an incident in Leeds today, Monday, 27 October, involving a 28-year-old man and the Prime Minister as he left the Civic Hall.
'The man was arrested by local officers and was later de-arrested. The MPS Specialist Protection Command is responsible for the personal protection of the Prime Minister and will now conduct a review of the incident in consultation with West Yorkshire Police.'
Mr Cameron spotted the man running up to him and took a step back and to the left before security noticed and bundled the protester to the floor.
The PM did not fall over and calmly walked to his waiting car before being driven away from the scene uninjured.
One witness said Mr Cameron 'sidestepped' the man in a 'lovely little move'. The jogger had crossed the pavement towards the Prime Minister, clutching a white towel.
Police took the 28-year-old man away. He was arrested but later released. West Yorkshire Police said that no threat had been made, adding: 'Nothing sinister, just a man in the wrong place at the wrong time.'
But Conservative MP Mark Pritchard demanded a full investigation into how the Metropolitan Police security team allowed the man to get so close to the Prime Minister.
Mr Pritchard said: 'The Met Police have some of the best close protection officers in the world. However, this was a clear breach of security and could have been far more sinister in outcome.
'With the terror threat level increased, this cannot be allowed to happen again. The Met Commissioner should call an immediate and swift internal inquiry to discover why this happened and implement the necessary lessons learned as quickly as possible.'
Former Royal protection officer Steve Park said Mr Cameron's security had taken their 'eye off the ball'.
He said: 'They were concentrating on the Prime Minister rather than looking outwardly at the attackers.
'It's a serious security breach. The Prime Minister has then been allowed to stand alone and look at it for a momentary time.
'What should have happened is something called cover and protect. A protection officer puts his hand on the head of the Prime Minister and straight into the waiting car.
'It's a very significant security breach. For an attacker to be able to get to a Prime Minister. I don't remember that happening before.'
But Mr Cameron later played down the incident, telling MPs: 'Could I put on the record for once the debt I owe to the close protection teams that look after me and the very good job that they do.'
Making light of the incident, he added: 'John Prescott was in the room as I gave the speech so as I left the room, I thought the moment of maximum danger had probably passed. But clearly that wasn't the case.'
In 2001 Labour former deputy prime minister Lord Prescott punched a protester who egged him.
The Prime Minister's official spokesman said Mr Cameron expressed his 'gratitude and confidence' in the protection team.
Downing Street will co-operate with the Met's review of the incident, the spokesman added.
- Daily Mail