12:29pm Plaid Cymru GAINS Caerphilly from Labour, defeating Reform by 11.4 points, with Labour a dismal third and the Tories getting only 2%.
11:18am Friday The BBC is reporting that it’ll be close between Reform and Plaid. Turnout was 50.4% at this by-election. There’s never been a Welsh parliamentary election with a turnout over 50%. A result is “possible” around 12pm AEDT.
Guest post by Adrian Beaumont, who joins us from time to time to provide commentary on elections internationally. Adrian is a paid election analyst for The Conversation. His work for The Conversation can be found here.
Polls close at 8am AEDT Friday for a Welsh parliamentary by-election in Caerphilly. Wales and Scotland use proportional representation methods but with single-member electorates. When an MP for a single-member electorate resigns or dies, a by-election occurs.
At the 2021 Welsh election, Labour won Caerphilly with 46.0%, followed by the centre-left Welsh nationalist Plaid Cymru with 28.4% and the Conservatives with 17.3%. The far-right Reform came sixth with just 1.7%. The 2021 Welsh and Scottish elections were held concurrently with English local elections in which the Conservatives under Boris Johnson easily defeated Labour.
The only poll for this by-election is a Survation poll that has Reform leading Plaid by 42-38 with just 12% for Labour and 4% for the Conservatives. If the result replicates that poll, Labour would finish a distant third in a seat they won by almost 18 points in a poor election for them, while Reform’s vote would be up 40 points.
Labour has been the dominant party at Welsh elections since the first devolved election in 1999, winning half or just under half the seats. The next election is in May 2026 using 96 members elected in 16 six-member electorates. This reform will scrap the single-member electorates, so there won’t be by-elections.
In the Election Maps UK Welsh poll aggregate, Reform leads with 29.3%, followed by Plaid at 26.5%, Labour at 18.5% and the Conservatives at 11.0%. It’s a contest between Reform and Plaid for the most seats, with the once dominant Labour in third. Scottish parliamentary elections will also occur in May 2026. The Scottish National Party (SNP) has dominated since 2011. Polls suggest they will again be the largest party, but fall well short of a majority, with Reform possibly the largest non-SNP party.
On Saturday I will write about the UK deputy Labour leadership election, the Irish presidential election and the Argentine midterm elections. UK and Irish results should start reporting on Saturday night AEDT, with Argentina on Monday morning. The Argentine midterms will be the first national elections since Javier Milei won the presidency in 2023.
Past electoral events: Moldova, Czech Republic and Japan
Moldova uses national PR to elect its 101 MPs with a 5% threshold. At the September 28 election, the governing pro-European PAS won 55 seats (down eight since 2021 but above the 51 needed for a majority), the pro-Russian BEP 26 (down six), the centre-left pro-European Alternative eight (new), the left-wing populist RN six (new) and the right-wing PPDA six (new).
The 200 Czech MPs are elected by regional PR with a 5% national threshold. At the October 3-4 election, the right-wing populist ANO won 80 seats (up eight since 2021), the conservative SPOLU 52 (down 19), the liberal STAN 22 (down 11), the left-wing Pirates 18 (up 14), the far-right SPD 15 (down five) and the right-wing Motorists 13 (new). ANO will be able to form a government with both SPD and Motorists. The previous government was a coalition of SPOLU, STAN and Pirates.
Japan’s conservative Liberal Democratic Party (LDP) has held government almost continuously since 1955. On October 4, Margaret Thatcher admirer Sanae Takaichi was elected LDP leader, replacing Shigeru Ishiba, who resigned after the LDP and their Komeito allies combined lost their majorities in both lower and upper house elections in the last year.
After Takaichi’s election as LDP leader, Komeito ditched its coalition with the LDP. However, the LDP formed a coalition with the right-wing Japan Innovation Party. On Tuesday, Takaichi defeated the centre-left Constitutional Democratic Party’s leader by 237 votes to 149 in the lower house to become Japan’s first female PM.