Depends where you pay your taxes, own a house, and pay your child's university fees surely?
And I'm crying with laughter at the idea of coming back to the UK for NHS care. Thanks but no thanks, we're good for that over here.
Yes, people do go over to the UK to give birth - so that those children can pass on their British Citizenship, not for the superior healthcare they'd get whilst doing it.
@MagnetCarHair you have to apply online to the last constituency you voted in. Mine was the one in which I own a house, although I left that area in 1984 for university and then work. They ask you to provide evidence of your links to the constituency- I sent the house deeds and some wage slips, bank details etc. Took about two weeks to be approved.