If your licence does not include category C1, you will not be allowed to drive a motorhome that exceeds 3.5 tonnes. If you passed your driving test before 1st January 1997 then your licence will automtically include C1, otherwise you will have to take the required test. If your motorhome exceeds 7.5 tonnes, you will need a category C licence (HGV licence). When applying for a motorhome insurance quote you may need to declare details, such as the weight, of your motorhome.