The Car/Jeep and Trailer (EB category) licence is needed for larger trailers being towed by SUVs, Vans, Jeeps or large cars.  For example, drivers working in the construction industry towing trailers with building supplies or plant machinery (e.g. a mini digger), Farmers transporting cattle or sheep in two and three axle trailers or private cars towing a larger caravan.  Drivers towing horse boxes or working for outdoor activity companies transporting Boats, Kayaks and Canoes are likely to need an EB licence also.