Ah, I see.
![Smiley :)](https://www.talk.uk-yankee.com/Smileys/classic/smiley.gif)
If you're an EU citizen exercising your right to live in the UK, you'll probably find things like getting bank accounts a bit easier than the rest of us, in terms of the bank staff knowing how to cope with a foreign passport/account applicant. Shouldn't really be that way, but it is!
Your documentation will need to be in your name; meggles is right, though, that you can just have your bank statements sent to your brother's address and most banks should accept this as proof of address. If you'll be living with your brother, you'll need to be added to his council tax; most banks should also accept a council tax statement as proof of address (he can add you and then request a new statement be mailed out - ours took about three days).