Arriva London is a division of Arriva which operates bus services in London, UK. It is made up of many previous bus operators including previously independent Grey Green. Operations are split between two registered companies, Arriva London North and Arriva London South.

Arriva London was previously the operator with the largest number of London Buses route contracts, however Go-Ahead London has now gained more contracts.

In 2005, TfL reported that Arriva London had more complaints a year than any other bus operator in London, although at the time Arriva did operate the biggest percentage of bus services in London.

They have ten bus garages.

This garage holds 63 buses, and runs London bus routes 34, 125, 329, 24-hour route 102, school route 629 and 634.

Opened in July 1912 by the LGOC to house their Central London route in competition with the MET trams. Just before World War II the allocation at AD was entirely STL, whilst afterwards it was allocated RT, RTL, RTW and SRT's the only garage to be allocated all four standard double deck types, although none could fit in the garage until the roof could be raised by 10 inches, which was completed in 1952 after a process taking 20 weeks. The garage was further modernised in 1974 by which time the PVR was 60 buses. RM's arrived in 1969 replacing the RT's, but the RT's lasted there until 1978. OPO buses in the form of RF's began arriving and were followed in time by SMS, DMS, and M's. The RM's lasted on route 29 until the late 1980s, and in 1994 the allocation was 51, entirely M's. In latter years the allocation has increased slightly and other than Metrobuses, Volvo Citybuses (VA) and DAF DB250LF / Alexander ALX400 (DLA) have been allocated.

London ⁱ/ˈlʌndən/ is the capital city of England and the United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its founding by the Romans, who named it Londinium. London's ancient core, the City of London, largely retains its square-mile mediaeval boundaries. Since at least the 19th century, the name London has also referred to the metropolis developed around this core. The bulk of this conurbation forms the London region and the Greater London administrative area, governed by the elected Mayor of London and the London Assembly.

London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism and transport all contributing to its prominence. It is the world's leading financial centre alongside New York City and has the fifth-largest city GDP in the world (and the largest in Europe). London has been described as a world cultural capital. It was the world's most visited city during 2011 and London Heathrow is the world's busiest airport by number of international passengers. London's 43 universities form the largest concentration of higher education in Europe. In 2012 London will become the first city to host the modern Summer Olympic Games three times.