Green Line bus route 724

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20191028-Arriva-East-Herts-&-Essex-3897 (cropped).jpg
SystemGreen Line
OperatorArriva Southern Counties
GarageHarlow and Ware
VehicleAlexander Dennis Enviro200 MMC
Peak vehicle requirement7
St Albans
EndHeathrow Terminal 5
Length57 miles (92 km)
Frequency60 - 120 minutes
Journey time2 hours 12 minutes - 3 hours 36 minutes
Operates03:35 until 00:39
See also Green Line Coaches and timetable

Green Line route 724 is a bus service currently operated by Arriva Southern Counties as part of the Green Line Coaches network. It runs on an orbital route round the north and western outskirts of London between Harlow and Heathrow Terminal 5, and is partly funded by airport operator Heathrow Airport Holdings.


Route 724 was started by Green Line Coaches (then part of London Transport) on 10 July 1966, on a route from High Wycombe to Romford via North London using AEC Regal coaches.[1][2] By June 1972 it had been rerouted to start from Staines and serve Heathrow Airport.[3] The sections of route between Staines and Heathrow, and between Harlow and Romford were later dropped.

Route 724 was included in the sale of London Country North West to a management buyout when privatised in January 1988, in turn passing to Luton & District Transport in 1990, British Bus in 1994 and finally the Cowie Group in August 1996.[4][5][6][7] Today it is operated by Arriva Southern Counties.

In December 1997, a fleet of nine Plaxton Prestige bodied DAF SB220s were purchased, with extra luggage space built in.[citation needed] These were some of the first low-floor buses to operate in the United Kingdom.

These were replaced in August 2006 by nine Mercedes-Benz Citaros. These were the result of a Quality Bus Partnership between Arriva Shires & Essex, BAA and Hertfordshire County Council. These buses seat 39 and also have extra luggage racking.[8] Journey times were also improved.[9]

In March 2008, the route was diverted to serve the new Heathrow Terminal 5.[10]

From 19 May, the service was withdrawn from Heathrow Terminal 4, with another new timetable introduced. Short workings on other parts of the route became routes 725 and 726.[11]

In February 2021, the Citaros were replaced by a fleet of 8 Alexander-Dennis Enviro 200MMCs, which were transferred from Arriva Kent Thameside.[12]

Current route[edit]



  1. ^ One-Man Operation for First Time on London Transport Coaches Archived 23 January 2016 at the Wayback Machine Commercial Motor 1 July 1966 page 45
  2. ^ Wagstaff, J. S. (1976). The London single-deck bus of the fifties. Oakwood Press. p. 10. ISBN 978-0853611981. All the Country Area and Green Line routes were meanwhile being converted to one-man operation, passengers paying the driver as they boarded, the first Green Line one-man service being the 724. This was a new route introduced in July 1966, using one-man RF coaches from the outset. Running between Romford and High Wycombe as a limited-stop cross-country facility, it proved very successful in contrast to the earlier 727 experiment.
  3. ^ 724 & 727 timetable Archived 23 December 2013 at the Wayback Machine London Country Bus Services 3 June 1972
  4. ^ London Country - three to go Archived 14 July 2014 at the Wayback Machine Commercial Motor 12 November 1987 page 32
  5. ^ Hansard Archived 29 November 2014 at the Wayback Machine House of Commons 18 April 1988
  6. ^ Morris, Stephen (September 1996). "NBC since NBC: a history of the former NBC subsidiaries". Buses Focus: 46.
  7. ^ Overview Archived 28 September 2013 at the Wayback Machine Arriva
  8. ^ Heathrow service relaunched Archived 14 July 2014 at the Wayback Machine Transport Xtra 18 August 2006
  9. ^ Revamped buses set for take-off Archived 23 March 2012 at the Wayback Machine Watford Observer 4 September 2006
  10. ^ Arriva - "Green Line 724 to serve Heathrow Terminal 5." Archived 26 September 2017 at the Wayback Machine
  11. ^ Route 724 timetable Arriva 2 June 2008
  12. ^ "HarlowRide Enthusiast Pages". Retrieved 1 April 2021.
  • McCall, Albert (1980). Green Line: the history of London's country bus services. New Cavendish Books. ISBN 0-904568-26-1.

External links[edit]