The Government Says

Notice: Countering Illegal Use of UAS Around Prisons and Sensitive Sites

Notice: Countering Illegal Use of UAS Around Prisons and Sensitive Sites
Local copy of Example_contract_PA_PA0000003789_0.pdf

https://www.gov.uk/government/publications/countering-illegal-use-of-uas-around-prisons-and-sensitive-sites

seen at 15:00, 3 February in Ministry of Justice - Activity on GOV.UK.