I fear that Peter Hitchens is probably right - The EU is our own Hotel California: We can check out, but we'll never leave - and that no matter how the referendum turns out Britain will not be permitted to leave the EU.
Quite apart from the determination of Britain's elites to prevent any attempt to leave there is also the problem that the US does not want Britain to exit the EU. And I can't see any British political leader having the courage to defy Washington. The British bulldog is now a well-trained lapdog.
Personally I'd like to see Britain leave NATO as well as the EU. The end of the Cold War meant the end of NATO's usefulness. NATO is now a danger to the peace and security of Europe rather than a protection. It is useful only to those who want a new Cold War.