Work has continued on the database over the last few days, however, much of the items that I checked resulted in updates to the information already in place, (and in a few cases, a revision of the scan provided which was better than that already in place).
Some additions have been made in the way of new entries with the database now having over 18,150 British marks listed with over 15,700 of these illustrated .... this being well over 86 percent ...
A couple of the more recent additions are ...

Llandyssil Sorting Tender

The rear of a cover showing two different Field PO marks, a Home centre Army PO mark and a registration mark from Sidcup .... all four of these being new additions to the listings ...
I will continue to add items or update the details as I get time ...
Regards .. Allan