Thanks mate! The current UK Cadastrals that are easy to use in iD/JOSM have got three distinct blocks in the south of the site. The middle one seems to be too narrow east-west, making the other two too close together. (or something like that.

Done! There were some old note= tags on those segments indicating that the street may have been mis-signed at some point. Have added some streetside images of the current signage and updated. changeset/177782292.

Are you sure about this? I think it's West Ham Lane as far south as Abbey Road. The Greyhound Pub and West Ham Lane Health Centre have addresses on West Ham Lane. Street signage visible on Bing opposite the junction with Densham Road also indicates West Ham Lane. First sighting of New Plaistow Road signage is on the side of the William Hill betting shop at 2 Church Street (e.g. just south of Abbey Road.

Hiya - welcome to OSM! These changes look OK from this armchair. But If I was to visit the new roads in person, would they be going through a construction site? Are the street names shown on local signage?

I was in the area, and for once I remembered to check the Open Notes ahead of time. (But forgot to close them, as you saw)

This relation is where the passenger service name (Mildmay) and service operator (TfL) , network (Overground) and brand (TfL again) is represented on OSM - relation/9674325#map=13/51.51045/-0.12394&layers=N

Are you sure about this? The Mildmay is the customer-facing brand for passenger services on this line. But other services including freight use it too. The line itself is still called the 'North London Line' (see here: https://en.wikipedia.org/wiki/North_London_line) and it is still operated by Network Rail - most full width lines in Britain are.

OK! That makes sense!

should this be service_times rather than opening_hours?

actually, not from survey, from NLS - OS 1:1,250/1:2,500 National Grid maps, 1947-1963

thank-you, LateNightTone!

I'd suggest it's safe to remove this. If the hill is not really noticeable on the ground, and there is no local trigpoint or admissible source for the name, it can probably go.