GLANCING at the passport of her boyfriend of six years, Lisa’s* heart pounded and a wave of nausea washed over her.
The couple were on holiday in Italy, and while looking for her sunglasses in the car’s glovebox, she’d stumbled across the document – which revealed, to her shock, that Mark “Flash” Stone was using a fake name.
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The discovery sent her life into freefall, as it later emerged the love of her life was actually an undercover Met Police officer, sent to spy on her and her eco-activist friends.
Despite sounding like the plot of a far-fetched film, it would transpire this was far from a one-off case.
Over more than four decades at least 139 police officers were given false identities to spy on more than 1,000 campaign groups.
Each officer lived undercover for up to nine years, forming close relationships and friendships.
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, Lisa said: “He wasn’t just a man who lied to me in a relationship, he was a fictional character, and he was placed in my life by an employer, and his employer was the police, and in order to create that deception he was trained.