Ohh, i was thinking of it differently. I was thinking that somehow she had her own policy with a car, and then Sam was just added in under that with his van.
I understand now, although to be honest it may be illegal but alot of 17 year olds do this with there first cars. Insurance is just too high for them to insure in there own names.
Edit: Thanks Jakg, completely understand it now.
Are there no companies where it's fine to have an additional driver drive just as much/more then the main driver?