When staying in London you will quickly realise that travel is very expensive, especially if you chose to use black cab taxis all the time. Traffic can be horrendous and the complex box junctions and one way systems, let alone the impatient drivers can be enough to put even the most confident drivers off using a car there.
The underground system is a more cost effective way of travelling round although parts of it close earlier on. The underground uses a system called the Oyster card which allows you to add credit to it and pay for your journeys by swiping your card on entrance and exit points. This makes getting on the train very straight forward and means you do not have to carry cash around with to allow you to use the underground system.
They have recently installed WiFi on the underground making it easier for passengers to work whilst on route. You can connect up your phone or laptop and get another half an hours worth of work in on your commute to and from the office.
Much of the underground is unused with stations closed off years ago but they are slowly trying to reopen many parts of it to make it easier for commuters.