Ann Widdecombe, the right-wing British politician whose killing this month sent shock waves through the country’s political establishment, was struck 21 times on the head with a hammer during the fatal lunchtime attack, prosecutors said in a London court on Tuesday.

The suspect, Joshua Kerry, 28, made a brief appearance at Westminster magistrates court, confirming his name and address in the city of Rotherham in the north of England. At a second hearing later Tuesday at London’s Central Criminal Court, he was ordered to be held until the next hearing on October 9.

Ms. Widdecombe was sitting at a table at her home in the village of Haytor in southwest England on July 8, eating lunch, when a man entered her home and asked her, “Don’t suppose you have bank cards and ID?,” according to images from a security camera recovered by police who investigated the crime scene, prosecutors said. They did not say whether or how she responded.

The man, wearing black gloves, then struck Ms. Widdecombe 21 times with the hammer before tipping her out of her chair onto the floor, taking her wallet and leaving, all within around two minutes, a prosecutor, Kashif Malik, said. He did not say anything about a potential motive.

After she failed to take part in a prearranged media interview, a gardener was asked to check on her and found her body the next day, Mr. Malik, told the court.

Footage from Ms. Widdecombe’s doorbell camera showed the attacker pulling up outside the property in a red Vauxhall Corsa car, the prosecutor said, adding that pathologists gave the provisional cause of death as a blunt force injury to the head.

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