The city has a very well developed network of public transportation. The city has bus service, tube or underground services and DLR services. Double decker red buses have been pride for London, they help you see the beautiful sites in the city entails. London has very well developed network of tube services which has 11 lines and are easy to understand. Maps for these lines are available at every station.
DLR services are driverless metros which gives you a tour of places near the dockyard. It is a widely used train in London. One can take Gatwick express to reach London centre from Gatwick Airport. Heathrow express from Heathrow Airport and Stansted express from Stansted Airport. National Express also functions from London Southend. There is also a travel pass which can be bought from nearest station to save money and to avail discounts at various tourist attractions.