Ridley advised that leaseback remained the only feasible solution and recommended that Britain initiate an education campaign to persuade the islanders. His fierce political opponent Tam Dalyell believed he was right and that but for Ridley's "confrontational style", "off-handed and offensive disdain" which upset both the islanders and the House of Commons, this policy could have avoided the war. The proposal was rejected by Lord Carrington who felt that any attempt to put pressure on Islanders would be counter-productive. However, the cumulative effect of stalled sovereignty negotiations, the British Nationality Act 1981 (which would deprive many Islanders of their rights as full British citizens), the announced withdrawal of , the shelving of plans to rebuild the Royal Marine barracks at Moody Brook, and the proposed closure of the British Antarctic Survey base at Grytviken on South Georgia, was to convince Argentina that Britain had no future interest in the Falkland Islands. Argentina would go on to invade the islands in April 1982, beginning the Falklands War, but was repulsed in June of that year, with the islands remaining in British hands.