Undercover UK cops infiltrated environmental groups, seduced women in the groups, fathered children with them, abandoned them

Undercover police had children with activists - Two undercover police officers secretly fathered children with political campaigners they had been sent to spy on and later disappeared completely from the lives of their offspring, the Guardian can reveal.

In both cases, the children have grown up not knowing that their biological fathers – whom they have not seen in decades – were police officers who had adopted fake identities to infiltrate activist groups. Both men have concealed their true identities from the children's mothers for many years.