A Ukrainian man appeared in a London court on Friday charged with setting fires at two properties and a car linked to Britain’s prime minister, Keir Starmer.

Roman Lavrynovych, 21, from Sydenham, in southeastern London, was charged with three counts of arson “with intent to endanger life” following the fires in North London.

Wearing a gray tracksuit, Mr. Lavrynovych, who was arrested on Tuesday, spoke only briefly and through an interpreter to confirm his name, address and date of birth.