The London, Chatham and Dover Railway (LCDR) was a railway company in south-eastern England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 from 1859 until the 1923 grouping

Railways Act 1921

The Railways Act 1921, also known as the Grouping Act, was an enactment by the British government of David Lloyd George intended to stem the losses being made by many of the country's 120 railway companies, move the railways away from internal competition, and to retain some of the benefits which...

 which united it with other companies to form the Southern Railway. Its lines ran through London

London

London 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...

 and northern and eastern Kent

Kent

Kent is a county in southeast England, and is one of the home counties. It borders East Sussex, Surrey and Greater London and has a defined boundary with Essex in the middle of the Thames Estuary. The ceremonial county boundaries of Kent include the shire county of Kent and the unitary borough of...

 to form a significant part of the Greater London commuter network. From the start the railway was in an impecunious position.

The Chatham, as it was always known, was much criticised for its often lamentable carriage stock and poor punctuality, but in two respects it was very good: it used the highly effective Westinghouse brake on its passenger stock, and the Sykes 'Lock and Block' system of signalling.