Let me elaborate, as assuming UK MPs know what the EU regards as in its best interests is a common failure. They say that the trade loss, or the loss of the 36billion or whatever means the EU will give on on the end. But it is the EU that will decide. The 36billion is a one off payment. Damage to the single market that May arise is a recurring cost. It is perfectly rationale for the EU to decide the 36billion is not worth what they - not the uk - judge the recurring costs to be.

And this is only talking trade. There are other factors that the EU regard as important and the UK cannot decide they are unimportant.