Well, as far as I know the US "truck" name is for the UK "Lorry" name.
That's why I used "truck", as on IMCDb all names were using US names (e.g. "Sedan" rather than "Saloon").
And currently the "trucks" are splitted between light trucks (cf the categories pickup, ambulances, chassis-cabin, etc.) listed with cars, and medium/heavy trucks listed in "Trucks".
This separation was made because it is the usual split for driving license and other legal stuff in European countries (at least France and Belgium). I do not know how it is in UK, and I know that it is different in US.