In https://www.openstreetmap.org/changeset/182543623, I've moved B2090 to "official_ref" on the assumption that this was originally added on a good basis, and added B2089 as the ref (road number) based on wiki guidance about signage: https://wiki.openstreetmap.org/wiki/Roads_in_the_United_Kingdom#Tagging_road_numbers

I've linked to this note from the changeset and left a note on the road elements, so I can't see any reason to leave this note open.