What exxactly does CAT D mean??

[V8Smith]

A fiend is looking at buying a CAT D car, the price seems OK but what does CAT D actually mean, what sort of damage might it have had?

Thanks

Mike

[V8Smith]

Thanks guys, quick responces as usual. He is going to check out insurance but in your experience is the insurance premium going to be much more and if so by how much roughly?

Cheers

Mike