 At the 1938 Northern Ireland general election Tommy Henderson and five defeated candidates stood for the Independent Unionist Association, which was distinct from other Independent Unionists.Four MPs elected to the Southern Ireland House of Commons for University of Dublin at the 1921 election.They were the only MPs to attend the opening of the Parliament of Southern Ireland, as all other members, who had been elected for Sinn Féin, sat as members of the Second Dáil.