I break betting odds news as it happens, so you’re never left behind when the market moves or a top offer lands.
- Reform UK EVENS favourites to win most seats at the 2026 Senedd election.
- Plaid Cymru (13/8) currently ahead of Labour (4/1) in the betting market.
- New one-vote system could reshape the political balance in Wales.
The next Welsh Senedd election, set for May 7, 2026, could be one of the most dramatic in recent political history, with bookmakers now making Reform UK the evens favourites to win the most seats.
Nigel Farage’s party are tipped to edge out Labour and Plaid Cymru in a contest that will be shaped by sweeping electoral reforms.
For the first time, voters will cast a single vote for a party, rather than having separate constituency and regional votes, with the new system distributing seats via a mathematical formula across 16 large constituencies.
This change is expected to shift the political landscape significantly, with early betting markets from Star Sports already reflecting the turbulence ahead.
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Next Welsh Senedd Election Odds
| Next Welsh Senedd Election | Odds | Probability |
|---|---|---|
| Reform UK | 1/1 | 50.0% |
| Plaid Cymru | 13/8 | 38.1% |
| Labour | 4/1 | 20.0% |
| Conservatives | 40/1 | 2.4% |
| Liberal Democrats | 100/1 | 1.0% |
| Greens | 500/1 | 0.2% |
Reform UK Surge Ahead
Momentum appears to be with Reform UK, who are even-money favourites to top the seat count.
Farage’s strong polling in Wales and dissatisfaction with both Labour and the Conservatives has seen the party’s odds shorten in recent weeks.
There's still plenty of time in the next few months for the betting market to change, with the odds expected to differ before the election in May.
What the expert says...
Labour Struggle As Third Favourites
Perhaps the most striking aspect of the market is Plaid Cymru’s 13/8 odds, putting them ahead of Labour at 4/1.
With the party consistently calling for greater Welsh autonomy, Plaid’s positioning under the new electoral system could help them capitalise on shifting voter sentiment.
Labour, meanwhile, face an uphill battle to retain their traditional dominance in Wales, with the new one-vote system expected to eat into their constituency advantages.
Top 10 Political Betting Websites in the UK
Where to Bet on Politics
Punters looking to follow the race can compare the latest markets on the best political betting sites.
For those keen to get involved, there are a range of free bets and UK betting sites offering specials on upcoming elections.
18+ New customers only. Bet £40+ get 2x£10 free bets. Evens or greater to qualify. 1x£10 free bet paid if all terms met. £10 free bets for us on singles and upwards. 1x£10 free bet paid 24h after payment of initial free bet. Free bets must be used at min. odds 4/1. Full T&Cs apply.
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