Sikh Federation UK's appeal with the UK's Information Tribunal will be heard in the New Year.
It centres around four files "withheld" during an official UK government inquiry ordered by former prime minister David Cameron into Britain's alleged involvement in the military action on Golden Temple in 1984.
"The first tier tribunal will consider this case in the New Year and it would be inappropriate to comment any further," a UK Cabinet Office spokesperson said.
The other documents includea Joint Intelligence Committee file on India; one with details of then British PM Margaret Thatcher's meetings with a close adviser of Indira Gandhi; and other papers under "India: Political" related to events around Mrs Gandhi's assassination in October 1984.
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Sikh Federation UK, which believes the closed files will shed more light on the extent of Britain's alleged involvement in the military operation in Amritsar, had earlier complained to the UK's Information Commissioner to make these documents public but it was decided to keep the files closed as they were "too sensitive".
It claims the decision to keep the documents secret is "political" rather than security related and that the "public has a right to know what happened 30 years ago".
Bhai Amrik Singh, chair of Sikh Federation UK, said in a statement: "This shows the lengths we are having to go to try and get to the truth and why we believe an independent public inquiry is necessary to get to the information the UK government will continue to withhold.
In 2014, Cameron had ordered the Heywood Review into the exact nature of British involvement in the operation at Golden Temple in June 1984 after documents released previously under the 30-year declassification rule had implied British SAS commanders had advised the Indian government as it drew up plansfor the removal of militants from the Sikh shrine.