Quote Originally Posted by Montmorency View Post
To be frank, mere executive discretion to negotiate something under very broad legislative approval should not be a Constitutional question, certainly not at this point in your country's history. If it indeed is, then that needs to be checked one way or another by the courts.
It's not a problem with the UK Constitution, it's the withdrawal mechanism. It's designed not to work (surprise) because you basically leave, and then negotiate your exit.