The UK documents that claim to show Margaret Thatcher sent a British adviser to counsel the Indian military on the 1984 Operation Bluestar focus attention on the botched attack by a shadowy unit called "Establishment 22' that reported to Prime Minister Indira Gandhi's office.

UK Prime Minister David Cameron has launched an inquiry into the alleged British role that was mentioned in "top-secret' letters attributed to senior officials of the Thatcher government 30 years ago. Read more