Counter-terror police are investigating whether a hostile state was involved in the arson attacks on Keir Starmer’s home - as his family say they have been left 'frightened'.

A 21-year-old man is accused of setting the Prime Minister’s £2m north London property alight on Monday night, just days after the torching of a car and a flat which he had previously owned.

The head of Counter Terrorism Command issued a statement urging any MPs who may be concerned to contact police, with police sources saying they have an open mind as to the motive.

Sir Keir has let the four-bedroom house in Kentish Town to his sister-in-law on a peppercorn rent since he moved into Downing Street last year.

City mayor Sir Sadiq Khan said the three arson attacks had left the Prime Minister’s family feeling ‘frightened’ for their safety.