51°30′32″N 0°08′28″W / 51.509°N 0.141°W
The Jubilee Line Extension (JLE) is the extension of the London Underground Jubilee line from Green Park to Stratford through south and east London. An eastward extension of the line was first proposed in the 1970s. As part of the development of London Docklands, the line was extended to serve Canary Wharf and other areas of south and east London. Construction began in 1993, and it opened in stages from May to December 1999, at a cost of £3.5 billion.
The 11 new stations were designed to be "future-proof", with wide passageways, large quantities of escalators and lifts, and emergency exits. The stations were the first on the Underground to have platform edge doors, and were built to have step free access throughout. Each of the stations was designed by a different architect, and the overall design of the project was led by Roland Paoletti. The stations have subsequently been praised as exemplary pieces of 20th-century architecture. The project was the single largest addition to the Underground in 25 years.