United Kingdom · national · leadership
How many UK Prime Ministers by end of 2027?
How many UK Prime Ministers by end of 2027?
THE RACE OVER TIME
How the markets have moved
Historical prices retain each source’s metric: Kalshi daily bid/ask midpoint, Polymarket outcome price, and ForecastEx daily close. Gemini and PredictIt show stored daily bid/ask observations where older provider history is unavailable. ForecastEx file dates use a 12:00 UTC display anchor. Lines join available observations; missing dates are not filled.
Accessible chart data
| Source | Outcome | UTC time | Price |
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Select up to four outcomes to compare their histories. Listings can represent people, parties, election dates or leadership changes; they do not establish candidacy or eligibility. Prices from separate contracts are not averaged. Nomination and general-election odds answer different questions.
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Names are matched only by case, spacing and punctuation. Provider-specific wording and resolution rules remain available through each contract link. Market listings reflect the verified catalog dated 2026-10-25.
Understanding this election’s prices
These contracts concern “How many UK Prime Ministers by end of 2027?”. Question type: leadership. We retain the original provider questions and settlement rules. Winning an election, leading a government, leaving office and calling an election are separate outcomes. Regional results do not establish a national winner.
The outcome list represents provider listings. A party market is not a direct popular election for prime minister. Contract prices may reflect different deadlines and settlement criteria; read the rules before comparing them. No prices are converted into vote shares.
Contract catalog checked 2026-10-25. Read the full methodology ↗
Original contract rules
Polymarket · 2
This market will resolve to the number of unique individuals who officially hold the office of Prime Minister of the United Kingdom at any point between market creation and December 31, 2027, 11:59 PM ET. This market will resolve based on the number of unique individuals to hold the position. For example, if an individual is appointed twice within the specified timeframe, they will only count once for resolution. To count for resolution, an individual must have been officially appointed by the United Kingdom Monarch. An individual’s time of appointment will have no bearing on this market so long as the individual officially serves as Prime Minister within the specified timeframe. Any interim or caretaker Prime Minister will not count toward the resolution of this market For clarity, Keir Starmer will count as one Prime Minister for the purposes of this market. The primary resolution source for this market will be official information from the Government of the United Kingdom; however, a consensus of credible reporting may also be used.
Original contract ↗Polymarket · 3
This market will resolve to the number of unique individuals who officially hold the office of Prime Minister of the United Kingdom at any point between market creation and December 31, 2027, 11:59 PM ET. This market will resolve based on the number of unique individuals to hold the position. For example, if an individual is appointed twice within the specified timeframe, they will only count once for resolution. To count for resolution, an individual must have been officially appointed by the United Kingdom Monarch. An individual’s time of appointment will have no bearing on this market so long as the individual officially serves as Prime Minister within the specified timeframe. Any interim or caretaker Prime Minister will not count toward the resolution of this market For clarity, Keir Starmer will count as one Prime Minister for the purposes of this market. The primary resolution source for this market will be official information from the Government of the United Kingdom; however, a consensus of credible reporting may also be used.
Original contract ↗Polymarket · 4+
This market will resolve to the number of unique individuals who officially hold the office of Prime Minister of the United Kingdom at any point between market creation and December 31, 2027, 11:59 PM ET. This market will resolve based on the number of unique individuals to hold the position. For example, if an individual is appointed twice within the specified timeframe, they will only count once for resolution. To count for resolution, an individual must have been officially appointed by the United Kingdom Monarch. An individual’s time of appointment will have no bearing on this market so long as the individual officially serves as Prime Minister within the specified timeframe. Any interim or caretaker Prime Minister will not count toward the resolution of this market For clarity, Keir Starmer will count as one Prime Minister for the purposes of this market. The primary resolution source for this market will be official information from the Government of the United Kingdom; however, a consensus of credible reporting may also be used.
Original contract ↗