MPs have been taking to Twitter to react to Andrew Mitchell's resignation as Chief Whip.
Stephen Mosley is a Conservative MP:
Sad to hear Chief Whip has resigned esp since he was such a great Int Dev Minister, but I think he has done the right thing for the Party.
John Woodcock is a shadow transport minister:
Manner of Mitchell resignation underlines how weak PM and Chx have become. Wonder if conference speech enough to stave off internal unrest.
David Cameron admits it 'became apparent' to the former Chief Whip that he could no longer do his job. So why was it not apparent to the PM?
Government Chief Whip Andrew Mitchell has resigned after swearing at police guarding Downing Street.
Losing one's temper with a police officer would be excusable in most people, but for the Tory chief whip to do means so much more.