The second path also had a second set of doors and there is definitely only one entrance there not two doors next to each other. Maybe you are correct there are two paths but they go to the one door? I am not sure right now, but will go and check some time next week.

Ah yes - well spotted, have removed the name:en

There's an older public bridleway then a more modern permissive bridleway here. Where they join it isn't entirely clear which is which. Most users will follow the surfaced route that dog legs past the parking, but the officially recorded route may be somewhat different. My understanding is the public bridleway actually went from node/21410080 to 1276131068 originally, but I'm not clear if it was diverted when the surfaced route was created or not.

Without resorting to the definitive map/statement it will be hard to say for sure. Even then I'm loath to map much based on them as officially there's still a public footpath across the middle of the lake.

But it is a bridleway - it's clearly signed as such. If strava isn't routing down it then surely that's a strava bug?

Might want to review this one as it seems to have gone a bit wrong - you've left a gap in the car park access road and a gap in the NCN51 relation...

what is the source of the Marston changes here? some are incorrect eg south meadow was connected to newland but you have disconnected it - it definitely is connected on the ground. I'm not sure great beanhills exists on the ground either - seems to be a construction site with no sign or public access.

The same path/street seems to have 2 different spellings - Forster Way and Foster Way. I'm guessing one is wrong...

Also Neal Way off Neale Road might this be Neale Way?

Only way I know to do a revert is through the JOSM editor - I can do that for you if you'd like?

Honestly the route of the A6 is highly confusing here, isn't well signed and seems to change quite a bit. I wouldn't assume bing is correct and as you say the only bit of bing that OSM is allowed to use is tracing from satellite photos anyway.

Might be wrong but I understood that Bromham Road was still part of the A6 until the last section of the western bypass was complete?

The occupier idea was borrowed from cambridge:

osm.wiki/Cambridge/University_of_Cambridge

Unfortunately a lot of the occupiers are now wrong as school of engineering and school of applied sciences no longer exist. A lot of departments seem to be swapping buildings too. Will have to review once the dust settles.

Building 122 looks like a typo? Should be 12?
A bit undecided as to how these should be named... mostly seem to get referred to as lanchester hall block X rather than building X. The only place that seems to call them building X is the official map.