By Law all heavy goods vehicles are required to be fitted with a tachograph. From 2006 all lorries are fitted with digital tachographs. The older analogue tachographs can still be used on older lorries. Tachographs work by recording the speed, distance and time a driver has been working as well as rest days. This to to help prevent lorry drivers working for too many hours or at dangerous speeds. It is important that the details on the Tachograph are kept unto date. If you need to change your address or other details you will need in inform your local council, who can update these. If you are new driver your company can apply for a tachograph on your behalf, or they may ask you to sign up and it is your responsibility to ensure your tachograph is entered before you drive any HGV. If you forget to use yours you may be fined ad will almost certainly face disciplinary action.