Before going for an offshore account, take a good look at www.safeoffshoreaccounts.com, or any of the other websites on the matter, and all the threads here from people who've lost money in offshore accounts, and avoid the sleepless nights....

Having said that, HSBC is probably one of the least likely to go under (no guarantees!).

Best thing would be to open whatever accounts you want in the UK while you can, then (after opening them) change the address to your parents, and don't tell the bank you're off abroad. File an R85 to get gross interest (don't file an R105, that gives the game away, and they'll tell you you have to move your account offshore).