
Cameron ordered a review into the matter after newly released official papers suggested that Thatcher, then prime minister, had sent an officer in Britain's elite SAS special air service to advise the Indians on the raid.
"I would note that so far there has not been any evidence to contradict the insistence by senior Indian army commanders responsible at the time that the responsibility for this was planned and carried out solely by the Indian Army," Cameron told Parliament.
Sikh groups
have said they were shocked by the idea that Britain may have been involved in
the attack, a bloody episode which angered Sikhs around the world and triggered
the revenge assassination of Prime Minister Indira Gandhi.