David Davis has accused Treasury officials of trying to "undermine" Brexit negotiations as part of a "desperate strategy" to keep Britain in the Single Market.

It today emerged that leaked draft Cabinet papers warned that if Britain leaves the Single Market without a new deal it will cost the Treasury £66billion in tax revenues.

Mr Davis, the Secretary of State for Exiting the European Union, is understood to believe that the the warning is part of a "succession of treasury briefings that are damaging negotiations".