Anglo Irish Agreement. Taoiseach Garret FitzGerald and British Prime Minister, Margaret Thatcher, shake hands after signing the Anglo Irish Agreement in Hillsborough Castle, in Northern Ireland. Tanaiste Dick Spring is on the left and British Foreign Secretary, Geoffrey Howe in on the right. 15/11/1985. Photo: Eamonn Farrell. © RollingNews.ie

Anglo Irish Agreement. Taoiseach Garret FitzGerald and British Prime Minister, Margaret Thatcher, shake hands after signing the Anglo Irish Agreement in Hillsborough Castle, in Northern Ireland. Tom King, the Secretary for Northern Ireland is in the centre.  15/11/1985. Photo: Eamonn Farrell. © RollingNews.ie 

Anglo Irish Agreement. British Prime Minister, Margaret Thatcher, demands the signed text of the Anglo Irish Agreement back from Taoiseach Garret FitzGerald in Hillsborough Castle, in Northern Ireland. Tanaiste Dick Spring is on the left and British Foreign Secretary, Geoffrey Howe in on the right. 15/11/1985. Photo: Eamonn Farrell. © RollingNews.ie

Anglo Irish Agreement. Taoiseach Garret FitzGerald and British Prime Minister, Margaret Thatcher, demands the signed text of the Anglo Irish Agreement in Hillsborough Castle in Northern Ireland.  15/11/1985. Photo: Eamonn Farrell. © RollingNews.ie

Anglo Irish Agreement. British Prime Minister, Margaret Thatcher, speaks to the media after signing the Anglo Irish Agreement in Hillsborough Castle, in Northern Ireland. 15/11/1985. Photo: Eamonn Farrell. © RollingNews.ie

Anglo Irish Agreement. Taoiseach Garret FitzGerald and British Prime Minister, Margaret Thatcher, shake hands after signing the Anglo Irish Agreement in Hillsborough Castle, in

Northern Ireland. Minister fro Foreign Affairs is on the left, Secretary fo Northern Ireland Tom King in in the Centre and Foreign Secretary Geoffrey Howe is on the right. 15/11/1985. Photo: Eamonn Farrell. © RollingNews.ie 

Anglo Irish Agreement. Ian Paisley, Leader of the DUP and James Molyneaux, Leader of the Ulster Unionist Party, hold a joint protest against the signing of the Anglo Irish Agreement, outside Hillsborough Castle, 

in Northern Ireland.

15/11/1985. Photo: Eamonn Farrell.© RollingNews.ie

Anglo Irish Agreement. A loyalist protestor against the signing of the Anglo Irish Agreement, in Hillsborough Castle, Northern Ireland. 15/11/1985. Photo: Eamonn Farrell. © RollingNews.ie