PollCheck

PollCheck is a UK polling aggregator that publishes rolling moving averages of voting intention polls for UK general elections, Scottish Parliament, and Senedd elections. It aggregates the Major pollsters (YouGov, Opinium, Savanta, Survation, Ipsos, More in Common) into a single smoothed series that is less noisy than individual polls.

PollCheck's 1 April 2026 five-poll Senedd average placed Plaid Cymru on 28.4 per cent, Reform UK on 27.6 per cent, and Welsh Labour trailing on 18 per cent. The 0.8-point gap at the top of the aggregate sits comfortably inside any single poll's margin of error, meaning neither lead party can claim a statistical advantage thirty days out from polling day. PollCheck also publishes the Scotland Holyrood aggregate which, as of 31 March 2026, placed the SNP on 36.2 per cent and Reform UK on 16.8 per cent in constituency vote intention.

Aggregators like PollCheck exist precisely because no individual poll is reliable enough to anchor a narrative on its own, yet media coverage routinely treats single surveys as decisive. For the 2026 Welsh and Scottish elections, PollCheck's rolling averages are the most defensible single source for vote-share claims, making it the primary tool for readers who want to assess which projections are durable and which are noise.