No I haven't. It's one code per account. I just create new accounts all the time - you just need a few email addresses in order that you can create new accounts !have you (or anyone else) been able to use the code twice on the same account?
the earlier £5 more code that was around.. it wouldn't let me use it a second time when I tried saying I'd used it one already!
dilemma on whether to lock in now or wait till mid next week!