Executive summary: The EU Referendum was advisory,
not binding; no UK decision on 'Brexit' has yet been taken;
although EU law has primacy, the UK has never given up sovereignty
to the EU; the issue of whether Parliament has to legislate for a
decision to leave the EU, before 'Article 50' notification
is given, is the subject of English court proceedings; an
alternative view is that the House of Commons should simply be
consulted; any agreement between the UK and the EU as to
'Brexit' could be a treaty needing prior legislation by
Parliament; alternatively, it could be subject to veto by the House
of Commons; if not vetoed, Parliament would need to legislate to
give it effect under UK law; in the absence of a withdrawal
agreement between the UK and the EU, the UK will automatically drop
out of the EU treaties two years after 'Article 50'
notification, unless an extension of time is
agreed.
