just called BT to confirm this, anyone who signed up after the 16th of Feb 2005 already has the above cap limit in place, anyone who signed up before this won't have the caps until May/June 2005 (thats across the board on every account regardless of how long you've been a customer).
http://www.bulldogbroadband.com/index.asp
The bulldog service is looking like the best option, i can't get the 4mb + phoneline cheap package, its not yet available in my area, so i'm looking at either the 1MB for ?30 per month or the 2MB for ?40 per month packages, and keeping my phone line (as in phonecalls to other people) with BT. This will be more expensive than the ?50 i pay at the moment, but will be cheaper than if i stay with BT and go over the caps (i DL 80GB last month that ?24.99 for 15GB then 65GB at ?2 (if thats the final price per gig), thats a stonking ?154.99 per month!)
i had to explain to the guy from BT broadband what a cap was, and spell it, then he put me through to customer services because he didn't know?
i also asked bulldog if they have any plans to introduce said caps, they said no. (she knew what a cap was incidently!)