For the edification of my colleagues who are not familiar, or viewers, Sinn Fein is a party that is historically the political wing of the IRA. It now has 23 seats in the Irish Dáil, with 14% of the vote. UKIP, which many would describe as a marginal party here, prospers in the PR system in the European Union, but has difficulty winning a single seat in the Westminster system. I think this underscores the point that sometimes marginal parties that are outside the political Overton window profit from PR systems.
On July 26th, 2016. See this statement in context.