Private school fee fixing scandal
In September 2005, fifty prominent private schools in the United Kingdom were found guilty of operating a fee-fixing cartel by the Office of Fair Trading. The OFT found that the schools had exchanged details of their planned fee increases over three academic years 2001–02, 2002-03 and 2003–04, in breach of the Competition Act 1998.
Source: Wikipedia — Private school fee fixing scandal (CC BY-SA 4.0)