The prime minister is set to align Britain with EU rules and keep the customs union Leon Neal/Getty Images

Theresa May will put her future in the hands of senior ministers today as she asks them to sign off a Brexit deal in the face of accusations of betrayal.

The prime minister was trying to sell the divorce deal and pact on the future relationship with Europe last night to a reluctant cabinet, which is due to meet at 2pm to agree it.

Leave-supporting cabinet ministers were coming under intense pressure to reject the deal as senior Brexiteers and the DUP launched a pre-emptive strike on what they claimed was an abject surrender.

Mrs May’s efforts to secure cabinet backing will be further undermined by a leaked diplomatic note seen by The Times spelling out how the EU intends to force Britain to accept…