You will want to find an angel investor that knows you, and is willing to back you and the team. Doesn't desparately matter where that is, but a prior relations

You will want to find an angel investor that knows you, and is willing to back you and the team. Doesn't desparately matter where that is, but a prior relationship / trust is very important. There are more angels like that in the US, but there are also some excellent ones in the UK. VC (and there's plenty of that in the UK) comes later -- after you're full time on the project, have built (at least some of) the product, proven its value (to some extent) and need a lot more cash (millions of dollars' worth). Check out seedcamp.com. Watch all the videos, and start to connect up with the UK/Euro start-up community.