McLaren is a Formula 1 Motorsport team. It cheated. It obtained confidential information about another team, Ferrari, which McLaren intended to use for its advantage.
This was found out by the bodies that run Formula One (The Federation L'Automobile (FIA) and World Motor Sport Council (WMSC) the FIA's General Assembly). Accordingly they decided that McLaren had broken its rules: the International Sporting Code (ISC) which are enshrined contractually in the Concord Agreement between FIA, Formula One Administration Limited (FOA) and the teams. They issued a fine of £32 million.
Then it got interesting.
McLaren did its tax return and stated that it had a reduction of gross income of £34 million (fine plus related stuff) and what's more this loss is deductible against earnings.
The UK tax authority HMRC disagreed.
There was a trubunal.