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SL9
RATP Dev Transit London Alexander Dennis Enviro400EV in Harrow
Overview
Operator	RATP Dev Transit London
Garage	Harrow
Vehicle	Alexander Dennis Enviro400EV
Began service	7 December 2019
Former operator(s)	Metroline
Night-time	N140
Route
Start	Heathrow Central bus station
Via	Harlington Hayes Yeading Northolt South Harrow
End	Harrow bus station
Service
Level	Daily
Route map Route SL9 corridor Legend Route Harrow Weald bus garage  N140   140  Harrow bus station  SL9  South Harrow station Northolt Park station Northolt station Yeading White Hart Roundabout Yeading Dilston Close Yeading Willow Tree Lane Hayes the Grapes  278  to Ruislip High Street Hayes & Harlington station  140  Harlington High Street Harlington Corner Heathrow Central bus station  N140   SL9   278  This diagram: view talk edit ← {{{previous_line}}}  {{{system_nav}}}  {{{next_line}}} →

London Buses route SL9, formerly London Buses route X140, is a Transport for London contracted Superloop express bus route in London, England. Running between Heathrow Central and Harrow bus stations, it is operated by RATP Dev Transit London.

The route partially parallels routes 140 and 278.

History

The route commenced on 7 December 2019, originally numbered X140, as part of a reorganisation of routes in the lead up to the opening of the Elizabeth line. Route X140 was introduced as a limited stop service between Harrow and Heathrow Central bus stations and as a partial replacement for the all stops route 140, which was withdrawn between Hayes & Harlington and Heathrow at the same time. Route X140 was initially operated by Metroline.

Upon being put out to tender, on 4 September 2021 route X140 was taken over by London Sovereign's Harrow bus garage. However, due to delays in the delivery of new Alexander Dennis Enviro400EVs and the refurbishment of the Wright SRM bodied Volvo B5LHs for the route, London Sovereign initially operated it with Wright Gemini 3 bodied Volvo B5LHs.

On 26 August 2023, route X140 was renumbered SL9, becoming part of the Superloop network of orbital express bus routes.

Current route

Route SL9 operates via these primary locations:

• Heathrow Central bus station
• Harlington
• Hayes & Harlington station
• Hayes
• Yeading
• Northolt station
• Northolt Park station
• South Harrow station
• Harrow bus station for Harrow-on-the-Hill station

Operation

The route operates at a frequency of a bus every 12 minutes on weekdays and Saturdays and a bus every 15 minutes on Sundays. Between the hours of 23:00 and 07:00, the route is covered by an all stops night service, numbered N140, running every 30 minutes between Harrow Weald bus garage and Heathrow Central bus station.

References

1. New route X140 - Limited stop service between Harrow and Heathrow Airport Transport for London 7 December 2019
2. RTs return to Heathrow for route 140 farewell Buses issue 778 January 2020 page 22
3. TfL contract awards give boost for zero-emission operation Route One 3 November 2020
4. Latest tendered service awards Buses issue 789 December 2020 page 21
5. RATP shuffles fleet Buses issue 800 November 2021 page 22
6. Third London Superloop route to start as X26 becomes SL7 Route One 18 August 2023
7. Route X140 renumbered - 26 August 2023 Transport for London
8. "Superloop: West London express Heathrow to Harrow bus service launched". BBC News. 2023-08-26. Retrieved 2023-08-28.
9. Toms, Adam (2023-08-26). "New Superloop bus route launched as TfL says it's 'more than just a paint job'". MyLondon. Retrieved 2023-08-28.
10. Route SL9 Map Transport for London
11. "Route SL9 Timetable". Transport for London. Retrieved 10 December 2023.
12. Matters, Transport for London | Every Journey. "N140 bus timetable". Transport for London. Retrieved 2024-02-29.

External links

Media related to London Buses route SL9 at Wikimedia Commons

• Bus routes in London
• Buses serving Heathrow Airport
• Transport in the London Borough of Harrow
• Transport in the London Borough of Hillingdon