Oh, that's just great. Two completely contradictory answers, both derived from the Government's own website!
I think that mine trumps Sara's though. That's certainly not because I'm better at researching answers than she is. It's solely because Sara's link seems to take no account of the 2007 ECJ ruling, so I assume that I've had the good fortune to find the latest information, whereas Sara has unfortunately found a page which still contains the old information.
Chris