London Buses route 21 is a Transport for London contracted bus route in

London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...

, England. Running between

Newington Green Newington Green is an open space in North London that straddles the border between Islington and Hackney. It gives its name to the surrounding area, roughly bounded by Ball's Pond Road to the south, Petherton Road to the west, Green Lanes and ...

and

Lewisham Lewisham () is an area of southeast London, England, south of Charing Cross. It is the principal area of the London Borough of Lewisham, and was within the Historic counties of England, historic county of Kent until 1889. It is identified i ...

, it is operated by

London General London General is a bus company operating in Greater London. It is a subsidiary of the Go-Ahead Group and operates services under contract to Transport for London. The company is named after the London General Omnibus Company, the principal ...

. The route is operated by

New Routemaster The New Routemaster, originally referred to as the New Bus for London and colloquially as the Borismaster or Boris Bus, is a low-floor Diesel fuel, diesel double-decker bus operated in London, England. Designed by Heatherwick Studio and manufa ...

History

In 2018, a Metrodecker EV prototype from

Optare Switch Mobility (originally called Optare) is an English bus manufacturer based in Sherburn-in-Elmet, North Yorkshire. It is a subsidiary of Indian company Ashok Leyland. The company would be responsible for the EV operations of the group with ...

was trialed on the route. In November 2021, the frequency of the service was reduced from 6-8 minutes to 8-10 minutes. From 4 February 2023, route 21 will be re-routed to serve Nag's Head in Holloway instead of Newington Green, partially replacing the daytime route 271, following a successful consultation in early 2022.

Incident

On 1 April 2017, a number 21 bus blocked the street in Cornhill as it became stuck after mounting the curb during an attempted

three-point turn The three-point turn (sometimes called a Y-turn, K-turn, or broken U-turn) is the standard method of turning a vehicle around to face the opposite direction in a limited space, using forward and reverse gears. This is typically done when the ...

References

{{London Bus Routes Bus routes in London