...and presuming the answer is 'no', then it's back to my original rhetorical question (in that i'm not specifically interrogating you, personally, for an answer): why, then, is it not OK for Birmingham roadsigns and Cardiff roadsigns to use different brandings, colours, typefaces etc, but it is OK for Sheffield (left) and London Liverpool Street (right) to use different brandings, colours, typefaces, and ways of ordering stuff?
(both examples date back to 2022 - the source for the 'new and improved' EMR signage is
https://www.eastmidlandsrailway.co.uk/help-manage/about-us/news-press/emr-to-improve-wayfinding-signage-at-eight-stations-across-its, and the GBR signage is of course taken from the wayfinding PDF I linked.)