The government feared that the death of former Indian Prime Minister, who was killed in a suicide attack by a Liberation Tigers of Tamil Eelam (LTTE) activist during an election rally in Sriperumbudur, could mean the Congress party is unable to keep in check "fissiparous Indian religious and ethnic communities which Congress has hitherto embraced under a secular all-Indian banner".
In official notes held as part of Downing Street files from the time and released by the UK's National Archives this week under the 30-year declassification rule, senior UK civil servant Percy Cradock warned that Gandhi's death marked an "end of an era" with "Indian democracy and unity facing their most difficult trial since independence".
"We do not yet know who was responsible for the assassination...A Tamil Tiger spokesman in London has denied that his group was responsible...If Sikhs are implicated, there could be a repeat of the very serious violence which followed the murder of Mrs Gandhi by a Sikh bodyguard in 1984," Cradock's note reads.
"The Congress party has moved quickly to elect Gandhi's widow, Sonia, as their new President. But her political inexperience and Italian origin ill equip her to hold the disparate elements of the party together. The party has no other potential leader with the qualifications to replace Gandhi," he added.
The file released by the National Archives also includes condolence messages exchanged between Major and then Indian caretaker Prime Minister Chandra Shekhar and President R Venkataraman on Gandhi's assassination.