The Conservative party won in 2010 and 2015 by a margin of about 25%, and since 1970 the fourteen parliamentary elections in this constituency and its predecessor were won by the Conservatives. The 2015 result gave the seat the 149th smallest majority of the Conservative Party's 331 seats by percentage of majority. In 2010, for the Uxbridge-born Conservative candidate John Randall, the one-party swing in the seat was 0.1% greater than that seen nationally – enough on the newly-drawn constituency boundaries to provide 48.3% of the vote, and a majority of more than 11,000 votes. In the 2010 and 2015 elections three attained 5% of the vote or more, to retain their deposits. In 2015, Boris Johnson was selected to retain the seat; he was elected with a swing of less than 1% to Labour. However, the 2017 election saw a 13.6% increase in Labour's vote share, which reduced Johnson's majority to only 5,034, less than half his 2015 margin and by far the lowest for a Conservative candidate in the area since 2001.
2019 election
Boris Johnson became Prime Minister of the UK on 24 July 2019. His 2017 majority in Uxbridge and South Ruislip of 5,034 votes was the smallest of any sitting prime minister since 1924. The main challenger to the seat was the Labour Party, whose 2019 candidate was Ali Milani. In April 2019, think-tank Onward classified the seat as "vulnerable" for the Conservatives, while YouGov classified the seat on 27 November 2019 as "likely Conservative". An article in The Independent on the same date inferred a 22.2% chance of Milani winning the seat from odds by bookmaker Paddy Power. Johnson retained the seat with an increased vote share of 52.6% and an increased majority of 15%. In 2019 two satirical candidates, Count Binface and Lord Buckethead, stood for election. Lord Buckethead appears in the 1984 movieGremloids, and several previous UK election candidates have used the name, but Jon Harvey was prevented from standing again as Lord Buckethead after Gremloids creator Todd Durham asserted his rights over the character. Instead, Harvey stood as Count Binface and an Official Monster Raving Loony Party candidate used the name Lord Buckethead. On 6 December, Lord Buckethead encouraged constituents to vote for Labour candidate Ali Milani. Also standing was William Tobin, who aimed to receive no votes. As an expatriate who has lived abroad for 15 years, he was not able to vote in UK elections, but could stand as a candidate. Tobin stood to raise awareness of disenfranchisement of voting rights for expatriates, as well as 16- and 17-year-olds and foreign nationals who live in the UK. Tobin received five votes.
The Boundary Commission for England 2018 review provisionally recommended that the successor of the current constituency should be named Hillingdon and Uxbridge:
Brunel, Harefield, Hillingdon East, Ickenham, South Ruislip, Uxbridge North and Uxbridge South from the London Borough of Hillingdon and Northolt Mandeville and Northolt West End from the London Borough of Ealing
Constituency profile
The seat is in the Outer London commuter belt, is served by seven tube stations, and includes green spaces such as the Colne Valley regional park. In contrast to neighbouring Hayes and inner western suburbs, the area is without brutalist tower blocks. The highest density of buildings is found close to historic Uxbridge town centre, a hub in a seat that is ethnically diverse and prosperous, including on its outskirts Brunel University. Most of the borough electoral wards in the area vote Conservative, except for Uxbridge South, which returns Labour councillors. Workless claimants, registered jobseekers, were in November 2012 significantly lower than the national average of 3.8%, at 2.6% of the population based on a statistical compilation by The Guardian. The constituency voted to leave the European Union in 2016 with an estimated 57.2% of votes, according to a House of Commons Library report. In August 2018, an analysis of YouGov polling by Focaldata suggested support for Remain had risen from 43.6% to 51.4%. Boris Johnson, Prime Minister and Member of Parliament for the constituency, is a prominent Eurosceptic politician and was a key figure of the Vote Leave campaign in the run-up to the EU referendum on 23 June 2016; which resulted in a victory for the Leave campaign when the UK electorate voted in favour of British withdrawal from the European Union.