LONDON UNDERGROUND

London’s underground train services, which are run by Transport for London . The first underground railways in London were begun in the 19th century, and were the first of their kind in the world. The 11 lines of the system (usually known as the Underground or informally as the Tube ) are connected to British Rail stations and extend out of the centre of London to surrounding regions. Not all of the lines are in fact underground. Additions to the system have included the Docklands Light Railway , a privately owned railway joined to the London Underground and providing services to London Docklands .