The Met decided they needed to be seen to act to remove the "dangerous" rape alarms, but the easiest way to do that was to arrest these poor folks (https://twitter.com/ProfColinDavis/status/165561644937587509...). The police knew they knew were around and had rape alarms because that's their job and the police gave them the alarms.
Right-wing "English Constitution Party" were going to demonstrate with rape alarms (https://twitter.com/ProfColinDavis/status/165555531421578035...) and that got 'confused' in the more rabid press as 'eco-zealots' plot' sort of stuff.
The Met decided they needed to be seen to act to remove the "dangerous" rape alarms, but the easiest way to do that was to arrest these poor folks (https://twitter.com/ProfColinDavis/status/165561644937587509...). The police knew they knew were around and had rape alarms because that's their job and the police gave them the alarms.
Anyhoo, the rabid press, the deeply populist government, and the disgraced met police (https://www.bbc.co.uk/news/uk-england-london-65164489) are quite a mix.