This poll suggests Plaid Cymru could almost quadruple our seats in Westminster, with Labour almost wiped out in Wales.
There’s still a long way to go, but the message is clear - Plaid Cymru’s momentum is continuing as more people look to us as the pro-Wales, anti-Reform vote.
YouGov's September 2026 MRP projects that Labour would be the largest party in a hung parliament, were an election held tomorrow
Labour: 241 (-170 from 2024)
Conservatives: 130 (+9)
Reform UK: 123 (+118)
Lib Dems: 71 (-1)
SNP: 40 (+31)
Plaid Cymru: 15 (+11)
Greens: 9 (+5)
Others: 3 (-3)