Parties' Welsh vote share close to last opinion poll

The final shares of the Welsh vote in the 2017 General Election Credit: ITV News Cymru Wales

The 2017 election was seen as a major test for opinion pollsters, after a poor performance in 2015. The Welsh Barometer Poll, carried out by YouGov for ITV Cymru Wales and Cardiff University, was one of the closer last time but there was much revision of the sampling methods afterwards.

This time the final poll was very close to the actual result. It's a vindication of the approach taken by YouGov's, which proved better than most pollsters at capturing the increased turnout by younger voters