License Plate Recognition UK MOT Certificate?

UK MOT Certificate? - license plate recognition

With the growing number of cameras for the recognition of vehicle number plates in the UK, vehicles, crimes and misdemeanors and the license expired to take finance streets, cameras are now with the drivers, to catch the license is not valid MOT?

If not used, then why not? and / or when it is used?

What is the penalty for using a password (assuming that the insurance and the vehicle in road fit / able to pass a technical review)?