South East London & Kent Bus Company Limited, trading as Stagecoach London, is a bus company operating in central and south London and some parts of north-west Kent. The Selkent brand is a subsidiary of Stagecoach London and operates services under contract to Transport for London. The Selkent brand is not publicly used since 2010 as all buses are branded as Stagecoach, but it exists as a legal entity.

Selkent shares its headquarters with sister company East London at West Ham.

Selkent began as an operating district of London Transport in the early 1980s. On 1 April 1989, London Buses was divided into 11 separate business units, one of which was Selkent. The unit was the first London Buses subsidiary to completely cease operation of AEC Routemasters, with Catford garage's allocation on route 36B converted to use one-person operated dual-door Alexander PS bodied Dennis Lance single-deck buses in May 1992.^{[page needed]}

In 1994, Selkent was sold to Stagecoach Holdings at the same time as fellow subsidiary East London for £42 million (equivalent to £105,516,000 in 2023), with operations subsequently rebranded to Stagecoach Selkent. In November 2000, in line with the rebranding of the wider Stagecoach Group, Stagecoach Selkent and East London were consolidated under the Stagecoach London brand.

In August 2006, Stagecoach sold its London bus operations to Macquarie Bank for £264 million (equivalent to £482,478,000 in 2023). The new owner restored the Selkent name and hops logo. In October 2010, Stagecoach reacquired its old London operations for a reduced sum of £53 million (equivalent to £85,834,000 in 2023), with Selkent once again rebranded as Stagecoach London.

Between 1988 and 1994, Selkent had a standard London Buses red livery with a grey skirt, though the fleet of dual-door Alexander PS types on Dennis Lance chassis delivered for use on route 36B in 1992 wore a grey, white, black and red livery. Following privatisation, Selkent adopted an all-red livery with white Stagecoach East London fleetnames. This was replaced by a new standard bus livery of a dark blue skirt and orange and light blue swirl at the rear, with Stagecoach's standard off-white replaced by red to conform with Transport for London contractual requirements for buses on TfL services to be 80% red. While the company was owned by Macquarie Bank, an all-red livery was introduced, which was retained by Stagecoach to remain compliant with updated TfL livery regulations.

Selkent operates four bus garages.

Bromley garage operates routes 61, 146, 246, 261, 314, 336, 638, 684, B14 and SL3.