Others took the losing side in the Williamite War in Ireland (1689–91), and a much smaller number of them were re-granted their lands in the 18th century.

Following the Act of Union in 1800, the peerage of Ireland elected just 28 of their number to sit in the United Kingdom House of Lords, described as the "Irish representative peers".

This was a convenient way of giving a title for reasons of prestige to someone who expected to sit in the British House of Commons.

Following approval the Parliament of Ireland voted on the formal finalised "bill" (which could only be rejected or passed unamended).

At the state opening of the Irish parliament Members of Parliament were summoned to the House of Lords from the House of Commons chamber by Black Rod, a royal official who would "command the members on behalf of His Excellency to attend him in the chamber of peers".

Sessions were generally held at Dublin Castle in the 16th and 17th centuries, until the opening of the Irish Houses of Parliament in the 1730s.