Hello,
Andy from OSM's Data Working Group here.  I can see a pile of discussions at https://resultmaps.neis-one.org/osm-discussion-comments?uid=2856851 , and I gather there are a bunch of comments on notes as well.  
In order that discussions and pictures are more widely visible, it's probably worth moving the discussion out of changeset comments.  Historically the GB community has used the talk-gb mailing list, but the forum c.osm.org might make more sense here as you can drag and drop pictures easily.  Use a united-kingdom tag along with any others.
I'm not familiar with the infrastructure here, but as a UK cyclist I'm absolutely familiar with poor cycle signage, and as a UK pedestrian I'm also familiar with the problems caused by cyclists using infrastructure they shouldn't.
Let's get all the discussion (and the photos) somewhere more public so that more people than those currently commenting can get involved.
Best Regards,
Andy
