Like the adverts say, if you can get cable, you should.
I got Telewest 10MB last week, and I couldn't be happier. After being on Freeserve/Wanadoo/Orange 1mb/2mb basically since I got my own computer, this is a breath of fresh air. I haven't had any problems with reliability so far, and I'm getting as close to 10MB as possible, with some speed tests claiming I've got faster than 10MB.
£35 a month for 10, but they also do 4MB if that's all you can afford (However, there are rumours that everyone is going to be upgraded to 10MB early next year, fingers crossed), but it is actually unlimited (unlike all those ADSL offers), and the way I see it, you've got more chance of getting the actual speed you pay for than with ADSL.
http://www.telewest.co.uk/
I can't offer an opinion on the NTL side of things since they're now the same company, but I've heard that they aren't as reliable or as fast as Telewest. So be sure to find out who's area you're in.
Plus, I hear they're going to be offering 20MB next year and 50MB sometime after that although I reckon they'll have to overhaul the network capacity substantially first.
It really is awesome; Downloading at 1.16MB/s.
