A Rigid Medium Goods Vehicle with a trailer is also known as a Rigid up to 7½ tonne with a trailer.
If you need to tow a trailer with your truck, then you need to pass your C1+E. Trucks that are heavier than 3.5 tonne but less than 7.5 tonne are C1 Vehicles, to drive this truck with a trailer you need a C1+E.
Civil engineers towing mini diggers or mini excavators, Arboreal Specialists and Tree Surgeons towing chippers and mulchers. Recovery Vehicle drivers and Recreational Vehicles towing leisure craft, cars, motor bikes or boats behind their RV's may all need the C1+E entitlement.
Once you have obtained you Cat C1 licence you will then be able to apply your Cat C1+E and then your Cat C.