erchou: I've got a Microsoft Sidewinder X3 and it's pretty good. Great for gaming, reliable and well-performing. Doesn't have a million buttons or features, but for the price (30$ in the US, I don't know about UK) it's definitely recommended!
Oh, also, it's wired. I don't know if that's what you're looking for, but I actually prefer them that way :] and the buttons are reprogrammable.
EDIT: looking on amazon.co.uk, it's only 12.5 pounds. Quite a deal really ^^. If you want some extra keys, flashier design (and you're right handed!) you can also look into the X5 for a little over 20.
I was looking at this one on Amazon and wasn't sure if it was a bit too cheap. I don't really care about extra buttons as I'd never use them anyway and i prefer wired as you don't have to worry about the batteries running out.
Now I just have to wait until my vouchers arrive.