OperatorTransport UK London Bus
GarageArmstrong Way
VehicleAlexander Dennis Enviro400H
Alexander Dennis Enviro400H MMC
Peak vehicle requirement15
Began service9 April 2005
PredecessorsRoute 207
Former operator(s)First London
ViaHayes End
Southall Town Hall
Length10 miles (16 km)
FrequencyAbout every 8-12 minutes
Journey time53-86 minutes
Operates04:35 until 01:18
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London Buses route 427 is a Transport for London contracted bus route in London, England. Running between Uxbridge and Southall, it is operated by Transport UK London Bus.

It has a limited stop equivalent route; SL8.


First London Plaxton President bodied Dennis Trident 2 in Southall in October 2009

The conversion of route 207 to articulated buses resulted in the route no longer being able to serve Uxbridge, due to tight turns in the town centre, so the route was split into two sections on 9 April 2005 with the western end between Uxbridge station and Acton renumbered 427, running from Acton (AT) garage using Dennis Trident 2s cascaded from route 207.[1][2]

Transport for London were proposing to build the West London Tram between Shepherd's Bush and Uxbridge, running along Uxbridge Road. The tram would have replaced routes 207, 427 and 607. Transport for London claimed that trams would carry more passengers and be more reliable, but due to the Crossrail project going ahead the plans were scrapped.[3]

Upon being re-tendered, First London commenced a new contract on 10 April 2010, with new Wright Eclipse Gemini 2 bodied Volvo B9TLs.[4] From the same date the route was due to be extended to Acton Town Hall in place of the former Horn Lane terminus, which was eventually put in effect in January 2011.[5]

On 22 June 2013, route 427 was included in the sale of First London's Hayes garage to Metroline.[6][7][8]

On 8 April 2017, the route passed to Abellio London operating from Hayes garage.[9] This contract was only for three rather the usual five years to allow Transport for London the option of restructuring services after the Elizabeth line opened. On 11 April 2020, Abellio London commenced a new contract.[10][11]

On 4 March 2023, the section between Acton and Southall was withdrawn. The route was also extended from Southall Town Hall to Southall, Merrick Road via South Road and Southall station on the same day.[12]

Current route

Route 427 operates via these primary locations:[13]


  1. ^ Aldridge, John (September 2003). "A real test coming for artics". Buses (584). Ian Allan Publishing: 12.
  2. ^ Bus tender results Route 427 Transport for London 26 September 2003
  3. ^ Controversial tram plan derailed BBC News 3 August 2007
  4. ^ Bus tender results Route 427 Transport for London 14 September 2009
  5. ^ Bus route extension is boot for shoppers Ealing Gazette 19 January 2011
  6. ^ FirstGroup Announces Sale of Eight London Bus Depots Archived 5 November 2013 at the Wayback Machine FirstGroup 9 April 2013
  7. ^ Aberdeen firm FirstGroup sells off depots for £80m BBC News 9 April 2013
  8. ^ First quits London bus business Archived 7 June 2014 at the Wayback Machine Bus & Coach Professional 9 April 2013
  9. ^ Stagecoach loses out to Go-Ahead Buses issue 746 May 2017 page 22
  10. ^ Abellio secures three London bus contracts Coach & Bus Week issue 1407 20 August 2019 page 7
  11. ^ Tender News Bus Talk issue 60 October 2019 page 20
  12. ^ Route 427 rerouted - 4 March 2023 TfL 4 March 2023
  13. ^ "Route 427 Map". Transport for London.

Media related to London Buses route 427 at Wikimedia Commons