"VIC" test - and not having to declare Cat C/D

[Blown2CV]

ok i have a work colleague who has an 02 plate vectra that has been written off... twice. He maintains that if he pays £30 for a VIC test, and they say that it is OK and has been repaired properly, and is all one car etc. then he doesn't have to declare Cat C/D. Technically his is CatC-squared! Is this true? I have never heard of such a thing, but then I am not in the market for smashed-up cars.

[Blown2CV]

declare it to a buyer... i thought if it was Cat C/D then its on the register, which requires you to declare it to a buyer. However I am prepared to be proven wrong! He is under the impression that Cat C/D status will be removed if VIC passed. Is this bit wrong then...