David Davis leaving Downing Street last night after his edited dossier on the economic effects of leaving the EU failed to impress the Brexit select committee

The release of secret Brexit impact reports that are at the centre of a parliamentary row bears all the hallmarks of a whitewash, according to an insider.

David Davis, the Brexit secretary, gave the select committee an 850-page dossier outlining the economic effect leaving the EU could have on 58 different sectors of the economy. He was forced to provide the information after a binding vote in the Commons.

However, sensitive information has been withheld, prompting the Conservative Ken Clarke to accuse the government of reducing parliamentary sovereignty to a “ridiculous level”.

John Bercow, the Speaker, warned ministers that they could be held in contempt of parliament for withholding details from MPs. He said that he expected Mr Davis to appear before the Brexit select