A suspect has today been arrested by Scotland Yard's counter-terrorism unit over a possible firebomb attack on Sir Keir Starmer's home. The 21-year-old was held in the early hours of this morning on suspicion of arson with intent to endanger life. He remains in custody. The Metropolitan Police have not confirmed where the arson suspect was arrested. He was held after the doors of two homes linked to the Prime Minister in north London both suffered fire damage within 24 hours of each other, one