"If, in the future, I am to look my children in the eye and honestly say that I did my best for them I cannot, in all good conscience, support how our country’s current exit from the EU looks set to be delivered.

I voted to remain in the European Union and have not changed my view that continued membership would have been the better strategic course. Even so, I believe that it would be impossible and wrong to seek to go back to how things were before the referendum.

If Brexit is worth doing, then it is certainly worth doing well; regardless of how long that takes.

When MPs vote on the House of Lords’ amendments to the EU Withdrawal Bill I will support the amendment which will empower Parliament to reject a bad deal and direct the Government to re-enter discussions. For me, this is about the important principle of Parliamentary sovereignty.

Then, when the Government is able to set out an achievable, clearly defined path – one that has been properly considered, whose implications have been foreseen, and that is rooted in reality not dogma – it should go to the people, once again, to seek their confirmation.

We must be honest and open at all times with each other and with the public. We must renew our effort to bring the nation back together and proceed in our collective national interest, drawing on the best talent our country has to offer.

We will not change our country overnight – but we can and must hand our children a better legacy.

For me, resigning is a last resort - not something that I want to do but something I feel I must do because, for me, such a serious principle is being breached that I would find it hard to live with myself afterwards if I let it pass."