Andy Burnham’s July 2026 succession to Keir Starmer established the second prime minister in the current sequence, and traders assign an 85.5% probability to no further changes by December 2027. Burnham entered office pledging to halt the decade-long cycle of instability, with early moves focused on cost-of-living relief, devolution, and party unity after Starmer’s ouster amid weak local results and ministerial resignations. With the next general election not due until 2029 and no immediate signs of renewed Labour infighting or external shocks, the market views additional turnover as unlikely over the remaining sixteen months. A third prime minister would require either a rapid collapse in Burnham’s support or an unforeseen crisis, scenarios priced at just 14.5%.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHow many UK Prime Ministers by end of 2027?
2 86%
3 15%
4+ 1.3%
$115,952 Vol.
$115,952 Vol.
2
86%
3
15%
4+
1%
2 86%
3 15%
4+ 1.3%
$115,952 Vol.
$115,952 Vol.
2
86%
3
15%
4+
1%
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.
Market Opened: Jul 6, 2026, 5:21 PM ET
Resolver
0x69c47De9D...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.
Resolver
0x69c47De9D...Andy Burnham’s July 2026 succession to Keir Starmer established the second prime minister in the current sequence, and traders assign an 85.5% probability to no further changes by December 2027. Burnham entered office pledging to halt the decade-long cycle of instability, with early moves focused on cost-of-living relief, devolution, and party unity after Starmer’s ouster amid weak local results and ministerial resignations. With the next general election not due until 2029 and no immediate signs of renewed Labour infighting or external shocks, the market views additional turnover as unlikely over the remaining sixteen months. A third prime minister would require either a rapid collapse in Burnham’s support or an unforeseen crisis, scenarios priced at just 14.5%.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated



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