On 6 November 1981, Thatcher and Irish Taoiseach Garret FitzGerald had established the Anglo-Irish Inter-Governmental Council, a forum for meetings between the two governments. On 15 November 1985, Thatcher and FitzGerald signed the Hillsborough Anglo-Irish Agreement, which marked the first time a British government had given the Republic of Ireland an advisory role in the governance of Northern Ireland. In protest, the Ulster Says No movement led by Ian Paisley attracted 100,000 to a rally in Belfast, Ian Gow, later assassinated by the PIRA, resigned as Minister of State in the HM Treasury, and all 15 Unionist MPs resigned their parliamentary seats; only one was not returned in the subsequent by-elections on 23 January 1986.