As a licensed taxi driver in the capital of London you must have a detailed knowledge of roads and places of interest in London – this is known as the Knowledge. How long it takes to become a licensed taxi driver in London will very much depend on whether you want to be an ‘All London’ driver or a Suburban driver. There are varying different requirements for each. All London drivers, also known as ‘Green Badge’ drivers, need a detailed knowledge of London within a six mile radius of Charing Cross. To begin with there are 320 routes or ‘runs’ to learn, along with all the places of interest and important landmarks on and around these runs. It takes between two to four years to learn and pass the ‘All London’ Knowledge and this takes a considerable amount of commitment and dedication. Once you are licensed you can work anywhere in the Greater London area and the benefits of this are huge.