No issues with its removal, thanks! Like you say, it's not necessary in the UK, like you say, and it doesn't work around JOSM's false positive.

Just mentioning because I'm the author of https://josm.openstreetmap.de/wiki/Presets/UnitedKingdomAddresses , and I'm interested in getting it right (or at least, 90% right and palatable to anyone who prefers addr:substreet).