B4562 issue here: 

There is no evidence of it being signed past here, the last signage with the number on it I can see from Mapillary is this (https://www.mapillary.com/app/?lat=51.52380463672&lng=-3.2022214494675&z=17&pKey=261947695669089&focus=photo&menu=false), and even that sign looks fairly old so could be outdated.

Here for example (https://www.mapillary.com/app/?lat=51.529341177132&lng=-3.1857264507591&z=17&pKey=155246166606428&focus=photo&menu=false), there's no evidence of it being signed at all, and the eastern part of the B4562 is now split in multiple parts by a new housing estate.

Needs more evidence that the B4562 actually still exists, or whether it's changed, someone local needs to survey and confirm.