The cost of the police investigation into the plebgate row rose more than £10,000 in just over a month and now stands at nearly a quarter of a million pounds.

The Metropolitan Police has so far spent £248,000.45 trying to establish what happened when Tory former chief whip Andrew Mitchell was accused of a foul-mouthed rant at officers outside Downing Street.

At the end of September the cost to the Met stood at £237,000 and the latest figure, provided by the Home Office in response to a parliamentary question from Labour's Lord Hoyle, covers the cost as at November 7, 2013 .

Mr Mitchell resigned as chief whip amid the furore surrounding the original incident in September 2012, but it later transpired that police officers may have deliberately given false information to discredit the Sutton Coldfield MP.

The rise in cost came when three Police Federation representatives accused of giving false accounts of a meeting with Mr Mitchell were hauled before the home affairs select committee.