Hi again,
Rob W's postal data tools suggest only one box is expected here, but the untagged one is  the actual location.
Looking at Mapillary images it's a lamp box on a pole:
https://www.mapillary.com/app/?pKey=945267529647276

Combine into one at the Southerly spot?

https://osm.mathmos.net/postboxes/progress/TD/TD5/#19/55.59301/-2.43106
Happy Mapping,

James
