Spoiler from the Wikipedia plot synopsis:
"In his efforts to thwart the council, Syme eventually discovers that five of the other six members are also undercover detectives; each was employed just as mysteriously and assigned to defeat the Council. They soon find out they were fighting each other and not real anarchists..."
In 1977, Philip K Dick took this up a notch in A Scanner Darkly[2], in which the drug-addled protagonist is unknowingly spying and informing on himself.
[1] - https://en.m.wikipedia.org/wiki/The_Man_Who_Was_Thursday
The communications from the ZeroFox schlub to the DarkOwl narc give the DarkOwl narc the idea that the ZeroFox schlub could be the trailhead to an increased 2024 budget.
And so on.
Cue Keystone Cops clip.
When they actually start a revolution, every single conspirator quietly leaves the crowd to join a hideout of the secret government agency they were working for.
The McLibel case [https://en.wikipedia.org/wiki/McLibel_case] was a big thing for lefties when I was a teen. McDonald's sued some lefty British vegans over a pamphlet they were handing out, but didn't realize that the activists they were suing would love nothing more than to air their beliefs in court with McDonald's for years on end.
Turns out that one of the authors of the pamphlet was an undercover cop. The woman who being sued, Helen Steel, met a man during the lawsuit and dated him for two years until he disappeared without a trace. He was also an undercover cop. Keir Starmer offered his legal services to the accused for free, which is some of the best evidence that he also worked in British intelligence.