"Madeleine" (false name used for privacy) was an active member of Walthamstow branch of the Socialist Workers Party during the 1970s.

During that time she was deceived into an intimate sexual relationship by the undercover police officer HN354, alias "Vince Miller" https://powerbase.info/index.php/Vince_Miller_(alias)

She was the first woman abused in this manner to give oral evidence to the UCPI. You can hear the session of the inquiry when she was questioned: https://youtu.be/K8bxgNaIfY0

You can also read the reports from that day and the next, when HN354 was giving his evidence: http://campaignopposingpolicesurveillance.com/tag/madeleine/