"I have already approached the Indian government through the high commission of India for the need of an independent international enquiry to establish the exact facts. I will now raise the issue in the House of Lords," he added.
Some of the documents have been reproduced on the 'Stop Deportations' blog which focuses on Britain's immigration policy and claim Thatcher sent SAS officials to advise Mrs Gandhi on the operation. "I've only seen the documents this morning (Monday) and am
"I've only seen the documents this morning (Monday) and am told there are others that have been withheld. This is not good enough. It is not unreasonable to ask for an explanation about the extent of British military collusion with the government of Indira Gandhi," Watson, an MP for West Bromwich East, said.
He has written to UK foreign secretary William Hague and plans to raise the issue in the House of Commons.
"I think British Sikhs and all those concerned about human rights will want to know exactly the extent of Britain's collusion with this period and this episode and will expect some answers from the foreign secretary.
"But trying to hide what we did, not coming clean, I think would be a very grave error and I very much hope that the foreign secretary will...reveal the documents that exist and give us an explanation to the House of Commons and to the country about the role of Britain at that very difficult time for Sikhism and Sikhs," he added.
Five months after Operation Bluestar, Gandhi was assassinated by her Sikh bodyguards in retaliation for the raid on the Golden Temple.