London Buses route 251 is a Transport for London contracted bus route in London, England. Running between Edgware and Arnos Grove, it is operated by London Sovereign.
Route 251 commenced operating as route 551 in 1925, running from Whetstone via Arnos Grove and the North Circular Road to Edmonton. It was operated by a number of independent operators before all were absorbed into the London General Omnibus Company. By 1933, the route had been extended via Mill Hill to Burnt Oak, and the following year was shortened to terminate at Arnos Grove. Later that year it was renumbered as route 251.
Routed 251 in 1934 was based at Palmers Green (AD) garage using AEC Renown LT-class 'Scooter' single-deckers. Operation was transferred to Edgware (BT) garage in 1939 and to Muswell Hill garage over 1941/42. In 1949, the Scooters replaced by Weymann bodied Leyland TD-type single deckers. AEC Regal RF buses were introduced at weekends in 1953 and completely replaced the TDs in 1957. The allocation was transferred again to Edgware garage in 1963.
Route 251 was extended via Edgware to Stanmore on 7 September 1968 to replace the withdrawn section of route 245. In 1977, RFs were replaced by BL Bristol LHs, then by midibus Dennis Darts in 1990. Apart from a brief period using the infamous Optare StarRider, Darts in various forms became standard fare.
O 25 July 1987, the route was extended to Stanmore Church. It was withdrawn between Edgware and Stanmore on 3 July 1993, and replaced by route 142; the Sunday service was also withdrawn, but reinstated in 1996.
In 2001, Plaxton Pointer 2 bodied Dennis Dart SLFs were bought in to convert the route to low-floor. The allocation was moved to North Wembley (NW) garage on 4 September 2004.
On 2 September 2006, it was retained by Metroline. Brand new MCV Evolution bodied MAN 14.240s entered service in 2007.
North Wembley garage closed on 29 May 2009, with the allocation moved to Cricklewood (W) garage and the MCV Evolution bodied MAN 14.240s were replaced by much older Plaxton Pointer 2 bodied Dennis Dart SLFs. These were replaced by Alexander Dennis Enviro 200 Darts in September 2009.
On 3 September 2016, the route was retained by London Sovereign.
- Edgware Bus Station
- Burnt Oak Broadway
- Burnt Oak Station
- Mill Hill Broadway Station
- Totterige Village
- Totteridge & Whetstone Station
- New Southgate Betstyle Circus
- Arnos Grove Station