Um... (pedantry alert) isn't "double jeopardy" a concept that's being embraced by Mr Blunkett's White Paper, rather than being dropped, as Jed said in his initial post?

I notice that the European Union (hobby-horse alert) has no such effete reservations: both Ireland and Denmark are re-holding referendums whose outcomes didn't suit the European Elite. And, no doubt, they will continue to do so until their citizens vote the "correct" way.