I understood that low 'race finishes' were banned in the UK after the spectator fatality at the Junior World Gliding Championships in 2005. I'm not a competition pilot, so I'm no expert on this subject.
https://www.gov.uk/aaib-reports/ls1f...-9-august-2005
https://www.caa.co.uk/docs/33/factor200708.pdf
https://members.gliding.co.uk/librar...etition-rules/ (specifically 5.9.3.2 Finish Ring Minimum Altitude and 5.9.5 Safety and airmanship at finish).