Spycops inquiry has heard James Thomson lied to superiors and deceived two women into relationships

Managers of an undercover police officer believed that he had concocted a plot in which animal rights activists purportedly sought to obtain a gun to inflict a revenge attack on a political opponent, the spycops public inquiry has heard.

The officer, James Thomson, claimed he had uncovered the plot while he infiltrated animal rights groups. But his managers later came to doubt whether it was genuine, one of them appearing to call it “bollocks”.

An activist who was accused of a central role in the alleged conspiracy said it was a fabrication that could have resulted in him being unjustly jailed for years.

The undercover policing inquiry has exposed repeated duplicity by Thomson, who not only lied to his managers but also deceived two women into intimate relationships. He initially denied the existence of these relationships to the inquiry before admitting them.