Today's odd little research question: what does policing a football match cost? About £11k a game in the Premiership, but a derby can be wildly more (not really surprising I guess) https://thefsa.org.uk/news/cost-of-policing-is-making-clubs-pay-more-the-answer/
The original thing I was trying to trace was how much hosting a match costs the team - still haven't found an estimate but an intriguing detail is that the Chelsea sanctions said they couldn't spend more than £500k to host a match, & they pushed back on it as too low https://talksport.com/football/1061077/chelsea-roman-abramovich-government-sanctions-transfer-spending-budget-cap/