You'll love this one Abe...
https://www.spycops.co.uk/
Met police bent as fook, they were spying on everyone from trade unionists through to political activists and other left wing groups, basically anyone that went against the state and as such incurred government backlisting as a result.
As tactics they even used the real names of dead children.
Fooking hell

,,,,,
https://policespiesoutoflives.org.uk/interim-inquiry-our-press-release/
The women who were spied on welcome the Inquiry’s findings, which show the undercover unit was ‘unjustified and undemocratic’. They now demand the Met hand over the files gathered on them, and urge the Inquiry to ‘stop protecting police’ and reveal the full identities of all undercover officers.
The SDS operated from 1968 to 2008 and was tasked to infiltrate political and activist groups, with the intention of gathering intelligence to assist in public order policing. The interim report of the Inquiry investigates the operations of the SDS between 1968-1982. Inquiry chair Sir John Mitting has concluded that most of the groups spied on, which included women’s liberation groups, posed limited risk to public order and no risk to the safety of the state. Sir John Mitting said ‘it is hard to credit that penetration of or even reporting on these groups could have been thought worthwhile.’ [1]
In the report, Sir John Mitting declares that the intelligence gathered did not ‘justify the means’, which involved developing long-term friendships with unsuspecting members of the public and trespassing in their homes. He said: ‘had the use of these means been publicly known at the time, the SDS would have been brought to a rapid end.” [2]
Instead, it continued to operate in secret for another 40 years.
https://www.mirror.co.uk/news/uk-news/breaking-secret-police-who-tricked-30349270