Cheers for all this.
Yeah the £30 is abit of a pain, but to be honest quite happy to pay that for the luxury of not having a contract.
I checked the link you send me wingco1 and I have no problem with how they shape stuff. I had checked that out before... I mean trying to play L4D on o2 was impossible!
I was considering ADSL 24 but 30GB usage seems quite small to be honest.
I'll no doubt let you know what pans out once it's all done and dusted 
I'm just about to go with Plusnet. Like you, I didn't want a contract.
But think of it this way:
£30 and the service is great, and you stay for a year, then you've spent £30.
Sign up for a year, and the service is great, and you've not spent that £30.
Sign up with the intention of a year, and the service is poor, then it only costs you £30 to escape.
The argument I was given was "Why spend the money on something that you might not want to do?!"