– Shadow Home Secretary Yvette Cooper
It is essential that there is a full and independent investigation into what happened in Downing Street as we and others called for three months ago.
These very serious allegations involving a police officer must be rigorously investigated. And the full facts must be set out.
None of the reports from the Government in September raised the possibility of a witness nor is it clear whether this was checked out at the time or had any influence on events.
The senior civil servant who carried out an investigation for Prime Minister David Cameron into allegations that his Chief Whip Andrew Mitchell swore at police insisted that he did a "competent" job and came to the right conclusion.