for those who are thinking of joining Tiscali my advise would be wait read this it's from Tiscali forum
The following is a quote from an employee at prolog. This company handles tiscalis customer services among other things.
"Latest news this week, has been Tiscali has had major outages throughout the country, particularly on the £15.99 package. I believe earlier in the week, a large amount of London, Portsmouth and Bristol were out of service. Again, the customer service number has got worse, Prolog have hired in even more clueless agency staff who we will have to train and the Milton Keynes HQ number have shut it so all the calls are coming to us now which we can't deal with, and at the same time Tiscali have decided to increase their tv advertising. I despair".