To expand on what mrtksn means: in the UK, it is difficult to get a bank account without proof of address. It is also difficult to rent a flat without a UK bank account. There are a few ways around this:
- Have a friend put you on their water bill and use this as proof of address. I suspect this is illegal.
- Join a flatshare without getting on the lease, pay for your portion of the rent with Transferwise or something, and have your flatmate put you on the water bill. I sure hope this is legal.
- Find a bank which is a bit lax about proof of address and is willing to accept things like proof of employment. Lloyds used to do this, but I've heard they no longer do.