OK, having been a long time ntl cable customer, but recently moved to a non-cable area, i did a bit of research (but not a whole lot)...here are some findings:
1) wannadoo - offer twice the speed of bt for the same price (ie, 1Mb for bt cost of 512kb) - rang them, customer service rubbish - avoid at all cost - got an answer "computer system broken - I'll ring you back in 10 mins"...30 mins later, I re-rang them, computer system wasn't broken, just the numpty couldn't answer my question.
2) eclipse broadband - recently bought out by Kingston Communications (the fiixed telephone operator in Kingston upon Hull). These guys are not going to be going away with that sort of backing. They offer a 'flex' package, where you buy (and pay for), say 512kb, but if you need higher bandwidth you can 'flex' it up to the higher number (up to 2Mb, exchange permitting) for the period you need it (you pay extra while flexing). Colleague at work have these, and has been pleased. ISP provider of the month for many months running last year, but not in the past couple. Down side - huge installation fees, unless you're transferring from another ISP (i think it's free then) (
www.eclipse.co.uk for their web site)
3) tescos - cheapest of the lot...but, would you like a supermarket running your broadband? Also, they refused to acknowledge my telephone number existed (online service), so I left them alone.
4) BT - ok, I have some problems with them, even though they're the ones I went with. 1st problem is price, but they're going to have to drop that if they want to stay in the market. Main problem is also price related, but not cost of broadband - as said in the 'fax' thread, I hate phones - so I went on light user scheme with BT (I once had a £34 phone bill, of which only 70p was actual call charges...hence I changed)...but, you can't have broadband if you're on the light user scheme...so their prices are FAKE! The cost of a BT broadband is NOT £24.99 (or whatever) - it's £24.99 PLUS one of their crappy 'together' schemes. Mind you, I suspect whatever ISP you went for with adsl, where bt was supplying the local loop, you'd have the same problem...so mebbe it's an industry wide thing.
That's about as far as I got - as I said, eventually got bt - bit expensive, but works fine, and was installed (ahem, i mean they flicked the switch in the local exchange) 2 days ahead of schedule.