Undercover Met police 'betrayed' women in relationships
2 October 2012 Last updated at 13:12 BST
A group of women who claim they were tricked into sexual relationships with undercover policemen have spoken for the first time.
In exclusive interviews with the BBC they say the officers deliberately invaded their private lives in order to spy on them.
Eight women are now suing the Metropolitan Police, claiming the deceit has caused them lasting damage.
The Met says such relationships are "never authorised".