If you are the Registered Keeper of a vehicle, and the vehicle is caught by an automated speed camera or traffic signal, a Section 172 notice will be sent to your address requiring you to name the driver who was in charge of the vehicle at the time of the incident. A failure to respond to this notice its own separate offence which can incur 6 penalty points your driving licence and lead to disqualification.
It is sometimes the case that you have responded to a Section 172 notice, but for some reason that CPS have not received your response and continue to prosecute. In such circumstances it will be necessary to convince a judge or magistrates that you did in fact respond to the notice.Having a legal representative to advocate on your behalf in court can radically improve your chances of successfully defending you and your licence against such a charge.