I am more optimistic than other members of the Brexit Select Committee; I believe that the EU can and will agree to make legally binding changes that will enable the Attorney General to give revised advice on our not being tied indefinitely into a customs union against our will. But if my right hon. Friend comes back to the House with those changes, at that stage it is surely the responsibility of us all as MPs to support the Bill, get the business done and accept responsibility for that. Does my right hon. Friend agree that any attempt by MPs to pre-position ourselves as blaming the EU for no deal would be a severe dereliction of duty?