**Recent UK parliamentary by-elections have been triggered by individual MP decisions to resign their seats, most often using the Chiltern Hundreds mechanism, with the sitting MP's party moving the writ in the Commons.** The most recent contest took place in Clacton on 13 August 2026 after Reform UK leader Nigel Farage resigned amid scrutiny over finances and a standards investigation; Reform held the seat. Earlier in 2026, Labour triggered Makerfield to allow Andy Burnham to enter Parliament, while Scottish National Party resignations linked to dual mandates produced contests in Aberdeen South and Arbroath and Broughty Ferry. The next scheduled by-election is Holborn and St Pancras on 8 October 2026, following former Prime Minister Keir Starmer’s resignation from the Labour seat. No other parliamentary vacancies have been formally announced as of mid-September 2026, though local council by-elections continue across parties. Trader views on which party will next move a writ typically reflect monitoring of potential resignations driven by leadership transitions, internal pressures, health issues, or constituency-specific factors, alongside the conventional practice that the relevant party controls the timing once a vacancy arises. Upcoming events such as the Holborn contest and any post-leadership adjustments under new Labour leader Andy Burnham could influence short-term expectations.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedNEW
Oct 31, 2026
October 31
15%
December 31
39%
$124 Vol.
October 31
$52 Vol.
15%
December 31
$72 Vol.
39%
This market will resolve to "Yes" if a writ calling for a parliamentary by-election in a UK parliamentary constituency is issued by the UK Clerk of the Crown in Chancery by the specified date, 11:59 PM ET. Otherwise, this market will resolve to "No".
The issuance of a writ must be confirmed within the specified timeframe to qualify.
Only a writ issued after market creation will count. The writ for the Holborn and St Pancras by-election, issued prior to market creation, will not qualify.
The primary resolution source for this market will be official information from the government of the United Kingdom, including the UK Parliament and the relevant local government conducting the election; however a consensus of credible reporting will also be used.**Recent UK parliamentary by-elections have been triggered by individual MP decisions to resign their seats, most often using the Chiltern Hundreds mechanism, with the sitting MP's party moving the writ in the Commons.** The most recent contest took place in Clacton on 13 August 2026 after Reform UK leader Nigel Farage resigned amid scrutiny over finances and a standards investigation; Reform held the seat. Earlier in 2026, Labour triggered Makerfield to allow Andy Burnham to enter Parliament, while Scottish National Party resignations linked to dual mandates produced contests in Aberdeen South and Arbroath and Broughty Ferry.
The next scheduled by-election is Holborn and St Pancras on 8 October 2026, following former Prime Minister Keir Starmer’s resignation from the Labour seat. No other parliamentary vacancies have been formally announced as of mid-September 2026, though local council by-elections continue across parties. Trader views on which party will next move a writ typically reflect monitoring of potential resignations driven by leadership transitions, internal pressures, health issues, or constituency-specific factors, alongside the conventional practice that the relevant party controls the timing once a vacancy arises. Upcoming events such as the Holborn contest and any post-leadership adjustments under new Labour leader Andy Burnham could influence short-term expectations.
This market will resolve to "Yes" if a writ calling for a parliamentary by-election in a UK parliamentary constituency is issued by the UK Clerk of the Crown in Chancery by the specified date, 11:59 PM ET. Otherwise, this market will resolve to "No".
The issuance of a writ must be confirmed within the specified timeframe to qualify.
Only a writ issued after market creation will count. The writ for the Holborn and St Pancras by-election, issued prior to market creation, will not qualify.
The primary resolution source for this market will be official information from the government of the United Kingdom, including the UK Parliament and the relevant local government conducting the election; however a consensus of credible reporting will also be used.
The issuance of a writ must be confirmed within the specified timeframe to qualify.
Only a writ issued after market creation will count. The writ for the Holborn and St Pancras by-election, issued prior to market creation, will not qualify.
The primary resolution source for this market will be official information from the government of the United Kingdom, including the UK Parliament and the relevant local government conducting the election; however a consensus of credible reporting will also be used.
Market Opened: Sep 14, 2026, 5:47 PM ET
Volume
$124End Date
Jan 1, 2027Market Opened
Sep 14, 2026, 5:47 PM ETResolver
0x65070BE91...This market will resolve to "Yes" if a writ calling for a parliamentary by-election in a UK parliamentary constituency is issued by the UK Clerk of the Crown in Chancery by the specified date, 11:59 PM ET. Otherwise, this market will resolve to "No".
The issuance of a writ must be confirmed within the specified timeframe to qualify.
Only a writ issued after market creation will count. The writ for the Holborn and St Pancras by-election, issued prior to market creation, will not qualify.
The primary resolution source for this market will be official information from the government of the United Kingdom, including the UK Parliament and the relevant local government conducting the election; however a consensus of credible reporting will also be used.**Recent UK parliamentary by-elections have been triggered by individual MP decisions to resign their seats, most often using the Chiltern Hundreds mechanism, with the sitting MP's party moving the writ in the Commons.** The most recent contest took place in Clacton on 13 August 2026 after Reform UK leader Nigel Farage resigned amid scrutiny over finances and a standards investigation; Reform held the seat. Earlier in 2026, Labour triggered Makerfield to allow Andy Burnham to enter Parliament, while Scottish National Party resignations linked to dual mandates produced contests in Aberdeen South and Arbroath and Broughty Ferry.
The next scheduled by-election is Holborn and St Pancras on 8 October 2026, following former Prime Minister Keir Starmer’s resignation from the Labour seat. No other parliamentary vacancies have been formally announced as of mid-September 2026, though local council by-elections continue across parties. Trader views on which party will next move a writ typically reflect monitoring of potential resignations driven by leadership transitions, internal pressures, health issues, or constituency-specific factors, alongside the conventional practice that the relevant party controls the timing once a vacancy arises. Upcoming events such as the Holborn contest and any post-leadership adjustments under new Labour leader Andy Burnham could influence short-term expectations.
This market will resolve to "Yes" if a writ calling for a parliamentary by-election in a UK parliamentary constituency is issued by the UK Clerk of the Crown in Chancery by the specified date, 11:59 PM ET. Otherwise, this market will resolve to "No".
The issuance of a writ must be confirmed within the specified timeframe to qualify.
Only a writ issued after market creation will count. The writ for the Holborn and St Pancras by-election, issued prior to market creation, will not qualify.
The primary resolution source for this market will be official information from the government of the United Kingdom, including the UK Parliament and the relevant local government conducting the election; however a consensus of credible reporting will also be used.
The issuance of a writ must be confirmed within the specified timeframe to qualify.
Only a writ issued after market creation will count. The writ for the Holborn and St Pancras by-election, issued prior to market creation, will not qualify.
The primary resolution source for this market will be official information from the government of the United Kingdom, including the UK Parliament and the relevant local government conducting the election; however a consensus of credible reporting will also be used.
Volume
$124End Date
Jan 1, 2027Market Opened
Sep 14, 2026, 5:47 PM ETResolver
0x65070BE91...**Recent UK parliamentary by-elections have been triggered by individual MP decisions to resign their seats, most often using the Chiltern Hundreds mechanism, with the sitting MP's party moving the writ in the Commons.** The most recent contest took place in Clacton on 13 August 2026 after Reform UK leader Nigel Farage resigned amid scrutiny over finances and a standards investigation; Reform held the seat. Earlier in 2026, Labour triggered Makerfield to allow Andy Burnham to enter Parliament, while Scottish National Party resignations linked to dual mandates produced contests in Aberdeen South and Arbroath and Broughty Ferry. The next scheduled by-election is Holborn and St Pancras on 8 October 2026, following former Prime Minister Keir Starmer’s resignation from the Labour seat. No other parliamentary vacancies have been formally announced as of mid-September 2026, though local council by-elections continue across parties. Trader views on which party will next move a writ typically reflect monitoring of potential resignations driven by leadership transitions, internal pressures, health issues, or constituency-specific factors, alongside the conventional practice that the relevant party controls the timing once a vacancy arises. Upcoming events such as the Holborn contest and any post-leadership adjustments under new Labour leader Andy Burnham could influence short-term expectations.
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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