London Buses route SL8

London Buses route SL8, formerly London Buses route 607, is a Transport for London contracted Superloop express bus route in London, England. Running between Uxbridge station and White City bus station, it is operated by Metroline.

The route parallels route 207 and partially parallels route 427.

607
Route 607 was established on 21 July 1990 as an express service on the same route as route 207 between Uxbridge station and Shepherd's Bush Green via Uxbridge Road on Mondays to Saturdays.

Its number was previously used by a trolleybus route over the same roads, which operated from 15 November 1936 until 8 November 1960 when it was abolished as part of the London Trolleybus Withdrawal Programme and replaced by bus route 207. It was the only regular route in the 6xx series that is otherwise reserved for school routes. (There had been 6xx limited-stop routes in the 1970s.)

Route 607 was originally operated by Leyland Nationals and Leyland Lynxs. In 1995 Northern Counties bodies Volvo Olympians were introduced. The route was included in the sale of CentreWest to First London in March 1997.

In the early 2000s, it was proposed that the route be replaced by the West London Tram, however this project was abandoned in 2007. On 29 November 2008, route 607 was extended from Shepherd's Bush Green to White City bus station to coincide with the opening of Westfield London.

On 22 June 2013, route 607 was included in the sale of First London's Uxbridge garage to Metroline. In April 2019, Metroline commenced a new contract.

SL8
On 15 July 2023, route 607 was renumbered SL8, becoming part of the Superloop network of orbital express bus routes.

On 19 August 2023, the hours of operation were extended.

Current route
Route SL8 operates via these primary locations:
 * Uxbridge station
 * Hillingdon Heath
 * Hayes End
 * Hayes
 * Southall
 * Ealing Hospital
 * Hanwell
 * West Ealing
 * Ealing Broadway station
 * Ealing Common station
 * Acton Town Hall
 * Acton Vale
 * Shepherd's Bush Market station
 * Shepherd's Bush stations
 * White City bus station for Wood Lane station