2023 Uxbridge and South Ruislip by-election
A by-election for the United Kingdom parliamentary constituency of  was held on 20 July 2023, following the resignation of former Prime Minister Boris Johnson as its Member of Parliament (MP) on 12 June.

The seat was held for the Conservatives by Steve Tuckwell with a reduced majority of 495 votes. The result was considered an upset, as the seat had been heavily targeted by Labour; a large backlash against Johnson was expected in the constituency in the wake of the Partygate affair. Tuckwell attributed his victory to the unpopularity of London's Ultra Low Emission Zone scheme and its proposed expansion into the Borough of Hillingdon.

Background
Uxbridge and South Ruislip is a seat in West London, part of the suburban sprawl of Greater London. Suburbs in the constituency include Uxbridge, South Ruislip, Eastcote, Hillingdon and Yiewsley.

Johnson was first elected as an MP in 2001 for the seat of . After leaving Parliament to focus on being Mayor of London, an office to which he was elected in 2008, he was elected as the MP for Uxbridge and South Ruislip in 2015. In 2019, he became leader of the Conservative Party and Prime Minister when he won the leadership election triggered by the resignation of Theresa May. However, he stood down as Prime Minister and party leader in July 2022 following a series of scandals and by-election defeats which culminated in the mass resignation of much of his cabinet.

Johnson announced his pending resignation from Parliament in response to an investigation by the Commons Privileges Committee that was launched into whether he had knowingly misled Parliament in comments about Partygate. He was highly critical of the report, which recommended a suspension from Parliament that would have been long enough to trigger a recall petition that, if successful, would have forced a by-election.

His resignation became effective on 12 June. The writs for the by-election were moved, in Parliament, by Chief Whip Simon Hart on 14 June. A by-election must take place between 21 and 27 working days from the issuing of the writs, thus the by-election for Uxbridge would have had to occur between 13 and 21 July. Hillingdon Council later confirmed that the by-election would take place on 20 July.

On the same day, the Selby and Ainsty and Somerton and Frome by-elections were held.

Campaign 

Labour began campaigning the day after Johnson's resignation was announced, with candidate Danny Beales joined by Shadow Work and Pensions Secretary Jonathan Ashworth and Labour's campaign co-ordinator Shabana Mahmood, speaking to press with assembled supporters before canvassing. On 13 June, Mahmood ruled out a Lib–Lab pact; Lib Dem leader Sir Ed Davey had done the same on 10 June.

At a hustings on 4 July, Beales said that it was "not the right time" to expand London's Ultra Low Emission Zone (ULEZ) into Hillingdon. Beales had previously supported the policy earlier in the campaign.

Weeks before the by-election, London Mayor Sadiq Khan reversed his decision to close Uxbridge police station, in a move described by political opponents as a "cynical" attempt to influence voters. The closure of the station was long opposed by the Conservative-run council and the previous MP. The London Conservatives referred the mayor to the watchdog, Greater London Assembly's monitoring officer. The both Conservatives and the Labour candidate claimed credit for the reversal of the closure.

Polling 
One poll of the constituency was conducted in the days shortly before Boris Johnson's resignation by Lord Ashcroft Polls. The poll has been criticised by a journalist in The New Statesman for sampling issues, and allegedly under-representing the young. National polls suggest Labour could win the seat, but it would be a close race against the Conservatives. A poll by JL Partners after Johnson's resignation showed Labour in the lead, but within its margin of error.

Results
Seventeen candidates were standing in this by-election. The full list was announced on 23 June 2023.

 

There were 77 rejected ballots.

Aftermath
Against expectations, Labour failed to take the seat, despite winning the Selby and Ainsty by-election on the same day with a much larger swing. Many interpreted the result as being about opposition to the ULEZ expansion. The Labour leader Keir Starmer and deputy leader Angela Rayner both blamed opposition to ULEZ, with Starmer suggesting the Labour London Mayor Sadiq Khan should re-think the policy. Khan defended the policy and Starmer soon sought to heal the rift. The defeated Labour candidate, Beales, also criticised the ULEZ policy.

The elected chair of Uxbridge and South Ruislip Constituency Labour Party resigned his position and left the party on the day after the election, praising former leader Jeremy Corbyn.

Previous result

Notes

References

2023 elections in the United Kingdom
2023 in London
By-elections to the Parliament of the United Kingdom in London constituencies
Boris Johnson
Elections in the London Borough of Hillingdon
July 2023 events in the United Kingdom
2023