Category C1 + E   -  3.5 ton - 7.5 ton + trailer  -  Age 18 The law relating to 3.5 ton - 7.5 ton vehicles pulling a trailer is quite complex. In order to make this category simple we ask that you ring with your enquiry and we can then advise you further. However, click here for a simple explanation!(?) The price you see is the price you pay - Guaranteed! No hidden charges - all-inclusive prices.