London Buses route 2 is a Transport for London contracted bus route in London, England. Running between Norwood bus garage and Marylebone station, it is operated by Arriva London.

Arriva London is a major bus company operating services in Greater London. It is a subsidiary of Arriva UK Bus and operates services under contract to Transport for London. It was formed in 1998 from a fusion of previously separate Arriva subsidiaries Grey-Green, Leaside Buses, Kentish Bus, London & Country and South London Transport. Operations are split between two registered companies, Arriva London North Limited and Arriva London South Limited.