Go-Ahead London is the trading name used collectively for the London bus operations of the Go-Ahead Group.

The name first appeared in August 2008, before which the company had traded under separate names and brands. It is the largest bus operator in London, operating a total of 115 bus routes under contract to Transport for London.

The Go-Ahead Group is a large transport group based in Newcastle. It first became involved in London bus operations in September 1994, where upon the privatisation of London Buses it purchased London Central. In May 1996, it added another former London Buses subsidiary, London General, which had been sold in 1994 to a management buy out. These two companies subsequently developed in much the same way, both establishing a livery of red with a charcoal skirt and yellow relief band, and splitting orders for new buses.

A corporate image for Go-Ahead's London bus services started to appear in August 2008, when a new Go-Ahead London logo was unveiled.

On 1 April 2014, Go-Ahead restructured its Metrobus business, with the management of the Transport for London contracted services passing to the control of Go-Ahead London, with the remaining services administered by Brighton & Hove from 1 July 2014. Services are now operated under an expanded London General licence, however the Metrobus trading name is retained. London General's licence was formally increased by the Vehicle and Operator Services Agency on 25 April 2014.

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