"The stability delivered by the Belfast Agreement should never be taken for granted, " she said.

BBC: Theresa Villiers calls for 'bold moves' over flag tensions

While the Good Friday Agreement of 1998, also known as the Belfast Agreement, effectively ended the conflict, distrust remains between Catholics and Protestants.

CNN: STORY HIGHLIGHTS

In Northern Ireland, my government will continue to work towards the full implementation of all aspects of the Belfast Agreement and maintain close co-operation with the Republic of Ireland.

BBC: The Queen's speech in full