Saving in a UK bank

Is there any issues to be aware of with opening a nonresident account with a bank in the UK? Sounds like a good idea to make the most of the weak sterling.

1. Get near 1:1 rate for euro to sterling.
2. Earn interest while the exchange is what it is now
3. Take the money when sterling strengthens

I assume I have to pay DIRT. But other than that is it ok?

Anyone know which Uk bank offers a decent interest rate and allows non-UK customers.

Thanks

Actually, having searched the forum, I see most of my questions are answered. Sorry. Mods, delete if you wish.