Grandfather rights which are also known as automatic driving privileges apply to automobile licences that are issued before January 1, 1997. You will need the training to enhance your licence. If you obtained your driver's licence after that time then you cannot automatically operate Category C1 vehicles. People need to go for proper ways to get a 7.5 tonne lorry licence that includes proper training to have safer driving experiences.Therefore, driving heavy vehicles requires a proper way to tackle things in a better way.