Millions of vehicle owners in Britain may have invalidated their car insurance without realising, it has been claimed.
Research by Kwik-Fit found more than six million motorists have driven in an auto that does not have a valid MOT certificate.
The company explained car owners were not deliberately breaking the law, but were simply forgetting their test was due.
In order to help motorists, Kwik-Fit announced it will send its customers email reminders when they need to book their vehicles in for check-ups.
The firm already sends letters through the post when vehicle owners need to make an appointment.
Customer services director David White stated: "Forgetting to MOT your car may seem like a minor oversight but it\'s a widespread problem that can have serious consequences."
In other news, Kwik-Fit recently warned motorists who slip their vehicle into neutral when going downhill in order to save money at the pump were putting themselves and other road users in danger.