London Buses route 340 is a Transport for London contracted bus route in London, England. Running between Harrow and Edgware, it is operated by Arriva London.
Route 340 commenced operating on 14 November 1987 between Harrow and Edgware stations, as part of the Harrow Buses scheme, taking over the withdrawn section previously operated by route 140 between Harrow Weald (HD) garage and Edgware bus station, running between Edgware and Harrow-on-the Hill with a weekday peak extension to South Harrow station. The route was initially operated by Harrow Buses from their Harrow Weald (HD) garage using MCW Metrobuses.
On 19 January 1991, the route passed to Luton & District operating from their Garston garage (GR) using ECW bodied Leyland Olympians.
In 1994, the route was included in the sale of Luton & District to British Bus
In August 1996, the route was included in the sale of British Bus to Cowie Group and was rebranded as Arriva The Shires.
On 3 July 1993, the route was withdrawn between Harrow Bus Station and South Harrow station.
In 2003, the ECW bodied Leyland Olympians were replaced by low floor Alexander ALX400 bodied DAF DB250LFs.
On 4 September 2004, route 340 was retained by Arriva The Shires.
On 5 September 2009, the route was retained by Arriva The Shires.
On 1 January 2016, the Arriva group restructured its bus operations, which included the transfer of route 340 from Arriva The Shires to Arriva London.
In 2016, a Wright StreetDeck demonstrator and Wright Eclipse Gemini bodied Volvo B7TLs were introduced.
In August 2016, the Wright Eclipse Gemini bodied Volvo B7TLs and Alexander ALX400 bodied DAF DB250LFs were replaced by brand new Wright StreetDecks.
On 3 September 2016, the route was retained by Arriva London.
- Harrow Bus Station
- Harrow & Wealdstone Station
- Wealdstone High Street
- Harrow Weald Bus Garage
- Stanmore Broadway
- Canons Park Station
- Edgware Bus Station