Gambling Commission licences for Kalshi or Polymarket: 0

In Great Britain a prediction market needs a Gambling Commission licence, and neither Kalshi nor Polymarket has one. Northern Ireland has its own law. What each venue's terms say and what the regulators have said. The government said so in February 2026, and the Commission told unlicensed operators to stop targeting or transacting with people in Great Britain. The venues' own documents point the same way.

- Kalshi event contracts: Restricted
- polymarket.com: Close-only
- FCA warnings naming either venue: None found

Sources checked 30 October 2026.

Study: https://vultax.com/research/prediction-market-legality/united-kingdom
Markdown: https://vultax.com/research/prediction-market-legality/united-kingdom.md
Data: https://vultax.com/research/prediction-market-legality/united-kingdom/data.json
Share card: https://vultax.com/og/article/research/prediction-market-legality-united-kingdom
Live screen: https://app.vultax.com/predictions

Vultax Research Team, Is Polymarket Legal in the UK? Kalshi, Polymarket and the Gambling Commission, 2026-10-30, https://vultax.com/research/prediction-market-legality/united-kingdom