Dear Sir Graham,

I write to inform you that I no longer have confidence in the Prime Minister. It would be a travesty if the democratic verdict of the 2016 referendum – the largest in British history – were not delivered, yet the Prime Minister’s proposed “deal” is so bad that it cannot be considered anything other than a betrayal of clear manifesto promises.

These broken promises typify more than two years of poor Government decision-making. It was a mistake not to begin intense preparations for leaving on WTO terms the moment the result was delivered, approaching the negotiations with a stronger hand, positioned to walk away without a deal and consequently much more likely to secure a good one.

It was a mistake for our EU negotiations to be led by a career civil servant with no business experience when the Government had on hand a vastly experienced international trade negotiator, Crawford Falconer.

It was a mistake to create a new Brexit Department only to keep two secretaries of state so in the dark that they had to resign over a policy one would have thought they were overseeing. Trying to bounce Cabinet ministers into supporting her White Paper on the Future Relationship before they had a chance to consider it fully – as the Prime Minister did at Chequers – is simply an intolerable way for a Prime Minister to govern.