Even for those familiar with parts of the stories about women who were deceived into intimate relationships with undercover police officers, the evidence that has emerged in recent weeks has been shocking. The litany of destructive behaviour either carried out by, or caused by, officers deployed to spy on campaigners, who were mostly active in leftwing causes, is being laid bare as never before: self-harm, heroin use, unprotected sex leading to emergency contraception, coercive control and the sudden abandonment of female partners and children. On Tuesday, Belinda Harvey told the public inquiry how she was manipulated by Bob Lambert, who tricked at least three other women into relationships as well. Next week, Mr Lambert will face questions about who authorised the tactic of targeting and seducing young, female activists " and why he employed it so many times. Last month, another undercover officer testified that Mr Lambert had "bragged" about fathering a child. In their jointly authored book, Deep Deception, five women described how they found out that they had been systematically lied to by former partners " in some cases after decades of confusion and self-doubt. Mr Lambert stands out not only for the number of secret relationships he initiated and his alleged involvement in an arson plot, but also because his five-year deployment as a police spy in the 1980s was treated as a triumph. He was given a commendation and went on to run covert operations.