London tube. rouge blanc bleu chariots. railway London Transport hors-sol Photo Stock - Alamy
What is the difference between a 'tube' and a 'train' in London? - Quora
Detailed Design of Piccadilly Tube Trains Revealed | Railway-News
Underground Railway, British Museum Tube Station, Holborn, County of London, England, Stock Photo, Photo et Image Droits gérés. Photo MEV-10932479 | agefotostock
British Rail tube trains - Wikipedia
First Day of the London Tube | History Today
Cooling the tube - International Railway Journal
London fetes world's oldest underground railway at 150 | Reuters