Just a quick note to say it's foolish to close a US account. Make sure you have one that doesn't charge you to keep it open, but you'll likely want US accounts, even if you don't have money coming in. I use mine all the time--paying student loans in the US, buying things now and again from US websites that don't ever seem to work with my UK details well, when I travel back home, or when my family wants to give me money for Christmas or birthdays. They always get overwhelmed by the process of figuring out money orders and such, but they can easily deposit it in my US account and then I just use it to buy things from home or withdraw the money using my US debit card here in an ATM (if it isn't a large amount, in which case, I'd find a more appropriate way of transferring money).
Someday you may end up wanting a US account, and it is VERY difficult to set one up from the UK, so if you have one now, keep it up.