GB - misidentification of living streets from traffic signs

In Great Britain, a highway=living_street is identified by the Home Zone sign (the very rare TSRGD diagram 881 [1]), but Mapillary is generating false positives for the contraflow cycle line sign (the very common TSRGD diagram 960.2 [2]). Almost every instance of highway=living_street I have encountered in OSM so far has been incorrectly tagged and I would rather this problem were not compounded by a misidentified traffic sign.

See e.g. #327654756047232 on Narrow Street, London

[1] Item 27 in the Sign table — Schedule 11, Part 2 TSRGD 2016 at
[2] Item 7 in the Sign table — Schedule 9, Part 4 TSRGD 2016 at