Tony,
I've just typed your bike details into DVLA Vehicle Enquiries and no trace of it was found but it could still be about but not registered or on a SORN. You could try The Post Office Vehicle Owners Cub but they would only tell you if it is about, nobody will tell you where it is. Google the club.
Geoff
I tried to find details of my bantam MYF 739 two years ago but the DVLA had no record of it either.
I wonder if the number plates are time expired. I think the DVLA would have offered that as a reason had it been the case.
Were records of GPO bikes kept outside the post office?
Hi
I was a teleboy in Cardiff back in 1974 to 1978, I am still working for Royal mail.
Is there any way that I could trace the where abouts of my old Bantam 175 D14?
The reg number was XB0 676K.
Many thanks
Tony