New documents show Margaret Thatcher was 'depressed' over the situation in Northern Ireland in the 80s.

The state papers released under the 30-year rule show the former British Prime Minister's concern about violence in the north.

She confided in then Taoiseach Garrett Fitzgerald that the UK 'got it wrong' in 1921 with the north's border.

Ralph Riegel, from the Irish Independent, says many of the discussions between the two, were about the developing situation in the north: