Thanks for the pointer to that page - have reverted these, although was previously a mixture of London, Sidcup, Blackfen & Blendon city tags within DA14 and DA15. At least I've ironed out a few of those along the way!

Hi motogs
Thanks. I was walking Days Lane to create all the numbered house footprints on that visit, with a few dips into the tracks/alleys, but did not attempt to walk the full length of this section: very happy for you to update it to reflect the situation on the ground as I'm not in that neighbourhood very often.

These back lanes are variously tagged by different contributors as tracks/service roads/alleys, but reviewing that link I agree it's not on open land so probably should be service=alley, but there would be a lot of tracks in Bexley might need reclassification - e.g. is it really different to the track in your changeset osm.org/changeset/104580282#map=17/51.44334/0.11295

Source used = Bing imagery