In message , Andy Hall writes

If some bureaucratic idiot in a post office wants to play funny buggers

The bureaucratic idiot in the PO has *very* strict rules to follow, as
laid down by DVLA. DVLA have ruled that a home printed pdf certificate
of insurance is *not* acceptable as proof of insurance. The problem, of
course, is spotting them, so we don't :-)
--
Graeme