The Sun newspaper claims that unpublished records, made by members of Scotland Yard's specialist protection team, contradict Andrew Mitchell's statement about the confrontation between himself and police officers at the Downing Street gates.
The Sutton Coldfield MP launched into a tirade on Friday when police officers attempted to stop him riding his bike out of the main gates near No 10.
Police logbooks apparently show Chief Whip Andrew Mitchell called officers "plebs" and swore repeatedly during his furious outburst in Downing Street.
Andrew Mitchell delivered a statement at 8:00 this morning. He repeated his apology from last week and described last Friday as "a long and extremely frustrating day" which meant he did not show the police the amount of respect he should have done.
He claims he did not use the words attributed to him but still has not clarified exactly what he did say to police officers.
Deputy Prime Minister Nick Clegg, who had previously called for a "line to be drawn" under the issue, has said Andrew Mitchell should give a full account of the incident.
– Nick Clegg, Deputy Prime Minister
"I don't know what happened, I don't think anybody knows precisely what happened and there are rival versions being circulated in the press.
I think, therefore, it's really important that Andrew Mitchell explains fully and in detail his version of events."