revisited Kew today - requested three boxes of data (which if you have a Reader's Ticket you can do from home prior to arrival) - these are then available on arrival, and saves a 45 minute wait.
Anyway, now have sufficient information to finish the id for this bowl.
There is definitely no gap with 'dot' in the text in the Registrations Data files - so guess we may never know why the bowl was made with one, and the following is the exact wording on the page for this Registered No.
""Date of Application 18/10/50
Date of Registration 18/10/50
Certificate of Registration Issued 16/8/51
Item is registered as a Salad Bowl.
Name and address of Proprietor:
Henry Dresel Ltd.,
332 Cricklewood Lane,
and it appears to be saying Copyright Expired 18/10/55""
I have tried searching for Henry Dresel Ltd., but no luck...........anyone else aware of this name, although doubtless not the maker and probably just an wholesaler or distributor. Perhaps imported from the Continent even. Anyway, matter resolved for the time being, and now must move on to something else. So I don't get to have the triflle after all - just a boring salad.