It looks like Tiscali actually changed their terms and conditions in on 5th January 2005. Their site implies that customers signed before then are in the old T&Cs
http://www.tiscali.co.uk/products/br...terms_old.html
This does not have a specific cap clause
The new T&Cs
http://www.tiscali.co.uk/products/br...tcs/index.html have a very specific capping clause 8.4
Interestingly they now advertise as "Unlimited Access" rather than just "Unlimited".
What is not clear is whether those getting the boot are just the new users that signed to the new T&Cs or, older users too who should be subject to the less specific clauses.