Learner taxi drivers are tested several times during their training period by government officers. The exams are a terrible experience. The officers ask you "How do you get from Buckingham Palace to the Tower of London?" and you have to take them there in the direct line. When you get to the tower, they won't say "well done". They will quickly move on to the next question. After five or six questions, they'll just say "See you in two months' time." and then you know the exam is over. Learner drivers are not allowed to work and earn money as drivers. Therefore, many of them keep their present jobs until they obtained the license. The training can cost quite a lot, because learners have to pay for their own expenses on the test and medical exam.