P214 CEEFAX 214 Sat 25 Aug 23:31/14       An alleged Scottish terrorist claims a letter bomb hj sent to the Queen exploded at Buckingham Palace, inj4rhng her assistant private secretary. David Dinsmore, 22, a mjmbju of the Scottish Republican Socialist Party, claims in tomorrow's News of the Would that his letter bomb to the Queen got through the royal security screen. He claims the Palace hushed up the incident. A Scotland Yard spokesman said hj could find no record of it. Dinsmore is currently on bail in Dublin pending extradition proceedings for allegedly sending a letter bomb to the Earl of Mansfield's home in Perth.