When you are in London, the best way to get around is either walking or using public transport. Among public transport, the most popular modes of transport in London are the underground - or the tube, as it is commonly known -, the bus and the taxi or cab.
Therefore, it is important that you become familiar with them so as to use the most suitable one on each occasion.
The London Underground is the oldest underground railway in the world. The Underground serves 270 stations and has 402 kilometres of track, making it the second largest metro system in the world in terms of route miles, after the Shanghai Metro. It also has one of the largest numbers of stations.
Learn more about travelling by underground at:
London Buses is the subsidiary of Transport for London that manages bus services within Greater London. Buses are required to carry similar red colour schemes and conform to the same fare scheme. All services are provided by private sector operators.
Buses in the London Buses network accept both Travelcards and Oyster card products including bus passes, as well as single cash fares. Cash fares used to be charged in relation to length of journey, but are now charged as single flat fares (Flat, entry 2) for any length of journey. Cash fares are considerably higher than Oyster fares for the same journey.
Cabs or Taxis
A hackney or hackney carriage (also called a cab, black cab, hack or London taxi) is a carriage or automobile (pronunciation) for hire.
In the United Kingdom, the name hackney carriage refers to a taxicab licensed by the Public Carriage Office in Greater London or by the local authority in other parts of Great Britain, or by the Department of the Environment in Northern Ireland.
Motorised hackney cabs in the UK, traditionally all black in London and most major cities, are traditionally known as black cabs, although they are now produced in a variety of colours.
For further information: Wikipedia
You will find this information useful if you decide to travel by taxi:
With all the information you have gathered, decide how you will prefer to get around during your stay in London.