An extraordinary story of Andrea - who says she is the victim of a state sponsored crime. She became engaged to a man who, entirely unknown to her, was for many years working undercover for the police. For more than two years he promised her a new life, a new family and marriage. Then he simply disappeared. She had no idea what had gone wrong until she started to understand that the whole relationship had been a sham. He was married, living a double life, and sent to infiltrate her group of friends who were being watched - it seems - for their political beliefs. She calls the entire relationship a government sanctioned lie. It's not the first time this has happened within the Metropolitan Police. At the end of last year Police chiefs made an unreserved apology to women who were deceived into similar relationships - and paid out substantial compensation. They thought they'd drawn a line under the abuse - but this investigation by Newsnight and The Guardian shows that the problems for the Met are far from over. Richard Watson reports.
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