Theresa May has been warned by a senior Tory MP that the British public will “go bananas” if she agrees to a Brexit divorce bill of £40billion or more.

Robert Halfon, the former deputy chairman of the Conservative Party, said voters would not accept such a payment at a time when public services are clamouring for more funding.

The warning came as it was claimed David Davis fell out with the top official at the Department for Exiting the European Union after the Brexit Secretary’s demand to use private RAF planes for trips to the continent was repeatedly blocked.

Oliver Robbins, the UK’s most senior Brexit negotiator, was moved from DExEU to report directly to Mrs May in Downing Street earlier this year amid reports of a strained relationship with Mr Davis.

Mr Robbins reportedly refused to sign off on Mr Davis’s request to avoid using commercial flights with the Brexit Secretary apparently only getting his way after appealing directly to Number 10.