London Buses route 25

25
Tower Transit Alexander Dennis Enviro400 on Oxford Street in April 2014
Overview
Operator	Tower Transit
Garage	Lea Interchange (LI)
Peak vehicle requirement	64
Night-time	24-hour service
Route
Start	Ilford
Via	Manor Park Stratford Bow Aldgate Bank Holborn
End	Oxford Circus
Service
Level	Daily

London Buses route 25 is a Transport for London contracted bus route in London, England. Running between Ilford and Oxford Circus, it is operated by Tower Transit. As of 2015 it is the busiest bus route in London.

Route 25 began operation on 30 October 1910 between Old Ford and Victoria via Bank, Holborn, Oxford Circus and Piccadilly, the same routing as today's route 8. On 20 June 1912, routes 8 and 25 exchanged their eastern branches at Bank, with route 25 taking over what has become its traditional route from Seven Kings to Victoria. By the end of the World War I, route 25 was working daily between Seven Kings Garage and Victoria, with a Sunday 25A route from Chadwell Heath to Victoria. During the 1920s, London's bus transport expanded rapidly, and route 25 soon had gained 25B, 25C and 25D suffixed routes.

On 1 December 1924, many routes in the group were renumbered, with 25A becoming 125, 25B changing to 26, 25C to 126 and the 25D becoming route 145. This situation remained until 3 October 1934, when the newly constituted London Passenger Transport Board instituted its own numbering system, which generally re-instated the situation previous to December 1924, apart for route 145, which by then had developed into a self-contained route, thereby keeping its route number. Each route ran every 6 minutes on Mondays to Fridays, providing 40 buses per hour on the common sections; the routes were operated from garages in Seven Kings, Forest Gate, Upton Park and Hammersmith on route 25.