I hope my point was not lost on you.
Frankly, it doesn't sound to me that you know this guy very well. And I have a suspicion that you might be moving too quickly in deciding to marry this guy, and that this is a decision you will live to regret.
I hope I am wrong. But the fact that he only recently asked you where you lived, and you only recently found out he lived in London, does not sound as if your marriage has a good foundation.