London Buses route SL10

London Buses route SL10 is a Transport for London contracted Superloop express bus route in London, England. Running between Harrow and North Finchley bus stations, it is operated by First Bus London subsidiary London Sovereign.

SL10
London Sovereign BYD Alexander Dennis Enviro400EV at Harrow bus station in September 2025
Overview
Operator	London Sovereign (First Bus London)
Garage	Harrow
Vehicle	BYD Alexander Dennis Enviro400EV
Began service	25 November 2023
Route
Start	Harrow bus station
Via	Kenton Kingsbury Hendon
End	North Finchley bus station
Service
Level	Daily
Route map Route SL10  183  to Pinner station Harrow bus station  SL10  Kenton station Kenton Charlton Road Kingsbury station Kingsbury Pipers Green Hendon Magistrates Court Hendon station  183  to Golders Green station Hendon Central station  125  to Colindale station Hendon the Quadrant Finchley Central station North Finchley bus station  SL10   125  to Winchmore Hill ← {{{previous_line}}}  {{{system_nav}}}  {{{next_line}}} →

History

The route was first proposed by Transport for London in April 2023 as the first proposed new route in the Superloop express bus network. At the time of the consultation, the route was proposed to be numbered X183.

The route was renumbered from X183 to SL10 before it was introduced. Route SL10 was introduced on 25 November 2023. It is operated by London Sovereign as a variation to its route 183 contract that it parallels between Hendon and Harrow.

On 28 February 2025, the route passed from London Sovereign to First Bus London following the acquisition of RATP Dev Transit London by FirstGroup.

Current route

Route SL10 operates via these primary locations:

• Harrow bus station for Harrow-on-the-Hill station
• Kenton station
• Kingsbury station
• Hendon station
• Hendon Central station
• Finchley Central station
• North Finchley bus 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.

External links

Media related to London Buses route SL10 at Wikimedia Commons