1950–1974: The Urban District of Hayes and Harlington. 1974–1983: The London Borough of Hillingdon wards of Belmore, Frogmore, Hayes, South, and Yeading. 1983–2010: The London Borough of Hillingdon wards of Barnhill, Botwell, Charville, Crane, Harlington, Heathrow, Townfield, Wood End, and Yeading. 2010–present: The London Borough of Hillingdon wards of Barnhill, Botwell, Charville, Heathrow Villages, Pinkwell, Townfield, West Drayton, and Yeading.
Constituency profile
The south-west is Heathrow Airport, which is the largest single provider of employment including its many associated businesses, such as retail, international distribution, cargo handling and parking throughout the seat and nearby. Housing is overwhelmingly semi-detached houses and mid-rise apartments. The topography is near-flat and features the M4 motorway, mixed-traction Great Western main line, and the airport itself. Newer housing in the seat adjoins the Grand Union Canal and reduced pollution is expected from less diesel rolling stock on the main line. The seat has an income level of earnings slightly below national and Greater London averages. Among its working-age population, the most dominant occupation sectors are manufacturing, distribution, self-employed trades and light industry. ;Political history since 1997 McDonnell's majority has fluctuated between 25.4% and 41.6% of the votes cast over his runner-up, which in each election has been the Conservative Party's candidate. The 2015 result made the seat the 56th safest of the party's 232 seats. ;2016 EU referendum results The constituency of Hayes and Harlington voted 58.25% leave versus 41.75% to remain; this is in contrast to the public stance of incumbent MP, John McDonnell, at the time of the referendum.
History
The seat since its 1950 creation has in most elections been quite heavily Labour-voting in relative terms. In 1981 its Labour MP, Neville Sandelson, defected to the now Liberal-merged Social Democratic Party. Sandelson stood for election for the new party in 1983 which led to a three-way split in the vote which enabled Conservative Terry Dicks to gain the seat in 1983 and retain it in the next two General Elections on marginal majorities. In 1997, the seat swung heavily back to the Labour candidate McDonnell with his +17.5% swing exceeding that nationally. McDonnell's majorities have ranged between 25.4% and 41.6% of the votes cast.
