Britpick Question

[amberfocus]

What are the legalities of eloping in the U.K.? Do you need to get the marriage license a certain number of days ahead of time? Do you need to have lived in residence in the city you are eloping in for a certain number of days before you can marry there? I seem to remember reading something along those lines. Or can you just show up at the registrar's office and go to it like you could at a chapel in Las Vegas? Is there anywhere in the U.K. that is like Las Vegas where you can get married that same day? This question is not for Zeppelins so don't go getting any ideas! *smiles* Thanks in advance.