On my bitch's KC certificate it says;
Sire etc etc
KC/BVA Schemes: Hip:(04/12/2000) - 7/7
Dam etc etc
KC/BVA Schemes: Hip:(05/07/2000) - 0/2
So I would assume that yours have not been tested

My pup's Sire's hip score is not on his KC certificate but he's an import and I know he was tested under a different (not KC/BVA) scheme in Germany and his are fine too :-)
Stacey x x x