Over decades ago, those who monitored the Brits were told that there were over 30 distinct accents.
Apparently, that was an under estimate:
How many accents are there in the British Isles and North America?
https://www.quora.com/How-many-accents-are-there-in-the-British-Isles-and-North-A...
There are about 56 main “accent types” in the British Isles (or less controversially the “Anglo-Celtic Isles”), but within each of those accent types there a. ... In parts of Yorkshire, England, the 2nd person singular pronouns and adjectives “thou, thee, thy” are still used even among young people, and they have a very distinctive ...
True. Lived there for most of the 90’s.