See the press release here..
The OFT has found that a collective agreement between members of MasterCard UK Members Forum (MMF), including most major banks, setting the multi-lateral interchange fee (the MMF MIF) paid on virtually all purchases in the UK made using UK-issued MasterCard credit and charge cards between 1 March 2000 and 18 November 2004 restricted competition and infringed Article 81 of the EC Treaty and the Chapter I prohibition of the Competition Act.
What's this with the MIF...?
Well, the only way is down.......