At what distance should you be able to read a car number plate in the UK driving test?

The United Kingdom driving test is a test of competence that UK residents take in order to obtain a full Great Britain or Northern Ireland (car) driving licence or to add additional full entitlements to an existing one. Tests vary depending on the class of vehicle to be driven. In Great Britain it is administered by the Driver and Vehicle Standards Agency (DVSA) and in Northern Ireland by the Driver & Vehicle Agency (DVA). The minimum age at which one can take a UK driving test is currently 16 for mopeds and 17 for cars.

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 67 ft (20.5 metres). If the candidate needs corrective lenses 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, they will be taken further forward for one more attempt. If the number plate cannot read from here, 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 Driver and Vehicle Licensing Agency (DVLA) will be informed and the candidate's provisional licence will be revoked.