<P> Before getting to the car, the examiner will ask the candidate to read a car's number plate at a distance . The distance required is 20.5 metres for an old - style plate (A123 ABC) and 20 metres for a new style plate (AB51 ABC). If the candidate needs glasses to do this, then they must be worn during the test . If the candidate fails to read the first number plate correctly, then the examiner asks the candidate to read a second number plate . If the candidate cannot correctly read the second number plate, then the examiner must use a tape measure to measure the correct distance between the candidate and a third number plate . If the candidate cannot read the third number plate, then the candidate is deemed to have failed and the test will not continue . The DVLA will be informed and the candidate's provisional licence will be revoked . </P> <P> The candidate will have to reapply for a provisional driving licence and attend a test centre to have an eyesight check before they are allowed to rebook a test . If successful, the DVSA standard eyesight test must still be completed at the candidate's next practical driving test . </P> <P> The "Show me tell me" changed on 4 December 2017 . The examiner will ask you one:' tell me' question (where you explain how you'd carry out a safety task) at the start of your test and before you start driving . The new element is where you show how you'd carry out a safety task while you're driving . These are phrased in the form "Show me ..." and "Tell me ..."; as such . The show me questions on the move are: - Demist front or rear windscreen . Wash front or rear windscreen . Switch on your headlights . Sound your horn . Open / Close a window . There are 3 under the bonnet "show me" tasks . A failure to answer one or both of these questions correctly would result in a driving fault being marked against the candidate . https://www.gov.uk/government/publications/car-show-me-tell-me-vehicle-safety-questions </P> <P> The controlled stop, more commonly referred to as the "emergency stop", is an exercise which determines the ability of the candidate to stop the vehicle promptly yet under control during a simulated emergency . The simulation is performed by the examiner raising his or her hand and saying, "STOP!". A controlled stop exercise will be carried out on every extended test and one third of normal tests . This might be an emergency stop, or the candidate might be asked to make a controlled stop in a specific location . During dangerous weather conditions, such as rain and snow, this test can be left out for safety reasons . </P>

When did they introduce driving tests in the uk