Interesting - I would guess that is at Grosmont and Pickering.
I used to live near Grosmont in the 1970s and there was never a problem employing staff that I was aware of and a lot of the pay was poor. I was a teenager and lots of teenagers worked in the cafes and the shops and lived with their parents, close by. My guess is that some local working class folk have moved away and professional middle class families have moved in or retired to the area or local properties are now holiday lets run by families who used to be cleaners etc. Its also become a more expensive area to live in that in the 1970s, in relative terms. A £10k 2 bed cottage is now £300k, but wages are not 30 times higher. I got £1.10/hour working in a bar in 1980, cleaners would have been similar.