A TEENAGER with a "historical past of displaying off" killed three of his friends in a horror crash, a courtroom heard. Edward Spencer, now 19, was driving a Ford Fiesta close to Shipston, Warwickshire, when he smashed right into a Fiat 500, killing Harry Purcell, 17, Matilda “Tilly” Seccombe, 16, and Frank Wormald, 16. Spencer, who was 17 on the time, was driving his friends…