Here's the reply from RBKC Archives. I'm afraid it doesn't answer the question. Maybe though the abbreviation does somehow suggest who might be picking up the bill?
"We don’t really know what the abbreviations mean, aside from the obvious, as you say. I found an interesting paragraph in one of our genealogical books which applies to the ‘poor’ status:
“Burial entries may be accompanied by the word poor or the letter P. This indicates that the deceased was a pauper, and that the funeral was paid for by the parish, in which case other parish records may indicate poor relief being granted to the person during their lifetime. A marginal note such as aff. or A refers to an affidavit being sworn that wool was used for the burial shroud.”
The term ‘quality’ was sometimes listed together with trade or profession. I don’t know if that has any bearing on what AP, or NP means, considering there are also children on that list. The frustrating thing is that it’s usually something very simple, but these 18th/19th century terms are not always obvious."!
