DVLA - Hospital communication?

Cheers Mick , seems communication is not a strong point in NHS .
DVLA sent me letter saying ok to drive as long as within category of license & ok with doctor, called them to see if this meant hgv as well "oh no , that’s a different kettle of fish ".
Doc says "nowt to do with me , up to consultant "
Consultant says " we’ve got letter from DVLA , just waiting to action it "
Seem to be going round in circles