Sorry I have come into this a little late but Tiscali are offering, from the 10th of feb. A 1mb connection with no download limit for £24.99 a month, which is a cracking deal!
I've been with them on 512mb unlimited (£19.99 a month) for about 2 years now and I've never had any problems. (Although I would say spend £30 in PC world and get an Ethernet Modem rather than the USB one you are given, Just because the support for the free modems is given by a belgian company who's english isnt perfect)
Just personal preference of course.
EzY