The Queen may reject a Brexiteer Prime Minister’s demand to suspend Parliament to ram through a crash-out from the EU, a Whitehall grandee said today.

Lord Armstrong, who was Margaret Thatcher’s cabinet secretary, said the monarch could decide to consult Labour leader Jeremy Corbyn, Speaker John Bercow and Lord Speaker Lord Fowler if she believed the Government was asking her to prorogue Parliament to neuter its “rights or duties”.