I dont live in the UK but i'd really like some things
1)how much "contribution' should a person 'donate' if they are suspected of piracy.
2)Who makes the decision if the person is actually guilty of file sharing. Because as Tango said earlier if someone actually owns a CD he or she can legally download music.
3)How can the ISP actually differentiate legal downloads from illegal ones.

They were convicted mainly for uploading pre released albums