The ambiguity was that I could have entered UK as my "Permanent Residency / Current Location" are 2 different things. Also wasn't sure if a Tourist Visa is considered a "residence visa" as I'm presumably still considered a visitor not a resident. Anyway, thanks for your clarifications. The Vietnam Visa Advice fb group is a shitshow of rumour/trolls/scammers & I'm frankly amazed to see how well your group is run. Thanks again.
I've just tried that. The full list is better but it's not per 100,000 population. If I want to compare provinces to each other (or other countries) I've got to get my calculator out. Thanks for the suggestion though.