London Buses route 331 is a Transport for London contracted bus route in London, England. Running between Ruislip and Uxbridge, it is operated by Metroline.
Route 331 commenced operating on 1 October 1994, between Ruislip and Uxbridge stations. via Northwood, Mount Vernon Hospital, Harefield and Denham replacing the withdrawn section of route U1 between Ruislip and Harefield, and withdrawn route 348 between Northwood and Uxbridge. It was initially operated by Luton & District from the former London Country North West garage in Garston with Northern Counties Paladin bodied Volvo B6s.
In 1996, the route passed to CentreWest operating from their Uxbridge (UX) garage with brand new Plaxton Pointer bodied Dennis Darts introduced.
In 2001, the route was converted to low floor operation using brand new Marshall Capital bodied Dennis Dart SLFs.
In March 2008, the Marshall Capital bodied Dennis Dart SLFs were replaced by brand new Alexander Dennis Enviro 200 Darts.
On 5 July 2008, the route was retained by First London.
The route services places such as Ruislip Woods National Nature Reserve, Ruislip Lido and the award-winning village green of Harefield.
On 4 July 2015, the route was retained by Metroline.
In October 2015, the 10.2m Alexander Dennis Enviro 200 Darts were replaced by brand new 10.8m versions.
- Ruislip Station
- Ruislip Lido
- Northwood Station
- Mount Vernon Hospital
- Uxbridge Bus Station