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Activists have held a protest over alleged police sexual abuse committed by an undercover police officer ahead of a high court case on Wednesday.

Political groups and other supporters gathered outside Cardiff Central Police Station in protest on Tuesday.

The undercover officer, who called himself Mark “Marco” Jacobs is alleged to have had sexual relationships with two women.

Jacobs had involved himself with a number of anarchist and campaign groups in south Wales from 2005, before disappearing in 2009.

Two women and one man are suing the Metropolitan Police, South Wales Police and the Association of Chief Police Officers over the allegations.

One claimant, Tom Fowler, is a member of the South Wales Anarchist Network, formerly known as Cardiff Anarchist Network, which he said was infiltrated by Jacobs.

The 35-year-old was befriended by the undercover officer and will be bring his case before the High Court in London on Wednesday.

Members of Cardiff Animal Rights were also at the protest, which was attended by around 70 people, to show their support.

Speaking on behalf of the defendants, a Metropolitan Police spokesman said: “Our position remains that the nature of the evidence involved make these claims unusual and cover complex areas of the law.

“Preserving anonymity is vital.”