by John McEldowney. Introduction. The rise in popularity of the United Kingdom Independence Party(UKIP) in the UK amidst the possibility of popular support for euro-sceptic political parties raises major constitutional issues about the UK’s continued membership of the EU. A recent TV debate between the Deputy Prime Minister and the Leader of UKIP proved how difficult it was to present technical arguments for membership in the context of popular scepticism about the EU. Winning the argument to stay in the EU will not be easy as a promised “in/out” referendum is likely to be held if the Conservative Party win the next election. The time-table for the next general election is fixed for May 2015 but the run up to that election will set an unprecedented time for the UK. There are considerable self-imposed constraints on the UK’s approach to the EU that mark a considerable departure from the approach of previous governments.