The Central line is the current oldest tube stock in the whole of the London Underground.
The Circle Line Unfortunately this answer is wrong! According to Transport for London the only tube line to connect all London Underground lines is the Jubilee Line.
The London Underground, commonly known as the Tube, is the oldest metro system in the world. It opened in 1863 and has since grown to become one of the most extensive systems globally.
District Line (London Underground) from Hammersmith tube station to Victoria tube station.
Take the Piccadilly Line underground (tube) train or a taxi.
Presumably you mean the London Tube? If so, it is the Jubilee Line (silver).
Take the London Underground (the Tube) on the Jubilee line to North Greenwich.
The Underground, more commonly called the Tube.
The Tube. Some of the tubes lines have nicknames too such as the Northern Line (the misery line) and Waterloo and City (the drain).
The Northern Line, which is part of the London Underground metro line, also known as The Tube, transports around 252,310,000 passengers a year. That makes it the second busiest line in the London Underground.
In London Underground (tube) stations.
It is an underground rail network underneath London.