There are 270 Underground stations in London and its suburbs. In the centre of London you are never likely to be more than a few minutes from one of them. Stations are indicated by an illuminated London Transport symbol.
Look at your Underground map to decide your journey. You must buy your ticket before travelling, either from a ticket machine or a ticket office. You can buy Oyster card which may well save your time and keep you away from trouble .Trains run frequently from about 05.00 until 01.00 .
Make sure you wait on the correct platform for your destination,and choose your train by the indicator on the platform or the front of the train. It is important to know the final destination of the train you want,because from the platforms trains leave for several different dastinations. Please ask one of the station staff if you are lost. Your ticket takes to your through to your desination. Just follow the signs for the lines you want, and at al stations there are maps to help you. Keep your ticket to give up the end of your journey. Most trains stop at all stations,but certain stations are closed at weekends.