Yes, each person travelling needs their own Oyster card, Travelcard or contactless payment card. If you are coming to London in a group of 10 or more people who plan to travel around the capital together, you can buy a Group Day Travelcard*.
London has a famous underground railway system which we locals call the 'Tube'. This is because many of the tunnels are a round tube shape. Although people call it the 'Underground' or 'Tube', half of the stations are actually above the ground.
Since then the Underground network, affectionately nicknamed the Tube by generations of Londoners, has grown to 272 stations and 11 lines stretching deep into the Capital's suburbs and beyond.
subway, also called underground, tube, or métro, underground railway system used to transport large numbers of passengers within urban and suburban areas. Subways are usually built under city streets for ease of construction, but they may take shortcuts and sometimes must pass under rivers.
In most cases, paying by card is more convenient than cash, though we do recommend carrying a small amount of cash for parking, taxis, small purchases and tips. Ideally, take a Wise Mastercard and a Visa debit or credit card with you – plus a small amount of cash.
It is significantly cheaper to travel in London using an Oyster card than it is to purchase individual tickets for each trip. The only reason you would want to just buy individual tickets is if you are only using public transportation once or twice during your stay.
The average speed on the Underground is 20.5 mph (33.0 km/h). Outside the tunnels of central London, many lines' trains tend to travel at over 40 mph (64 km/h) in the suburban and countryside areas. The Metropolitan line can reach speeds of 62 mph (100 km/h).