Mark Jenner began five-year relationship with Alison, a leftwing activist, while undercover spying on political campaigners

An undercover police officer deceived two women at the same time over many years in a sustained betrayal of both of them, the spycops public inquiry has heard.

Mark Jenner had a relationship with a leftwing activist, known as Alison, for five years without disclosing to her that he was in reality an undercover officer who was spying on political campaigners.

During those years, he was married to his wife, who knew nothing about her husband’s relationship with Alison. His wife gave birth to his child during this time.

She became the first wife of an undercover officer to testify at the inquiry when she gave evidence on Tuesday.