Hi
Please use any validator with great caution. Best to amend only if you have local, on-ground knowledge.
way/348243849
From aerial imagery this path is clearly separated form the service road by a wall given the shadow cast. Knowing the steepness of the topography I suspect it's a retaining wall. They do not join.

leisure=recreation_ground is a valid tag

Hi John
I notice you've added highway=foot to railway=platform. Was this performed automatically by GoMaps or did you add them manually? After a discussion on the forum that iD editor was adding them by default it was felt these tags were unnecessary. as platforms only purpose is to be walked on.

Hi
You've added a way with no tags.

Hi
You've added a way with no relevant tags.

Hi
You've added two ways on either side of the Atlantic with no tags.

Hi
You've added two ways on either side of the Atlantic with no tags.

Is this path inaccessible? access=no?
way/30241165#map=15/51.3148/-2.3773

Do you have a link to a list?

Good Lord, how ridiculous

way/295244848

Is this area actually called New Passage or is it taken from the road name?

Hi
Should this sculpture have a NapTan code?

There was. Now fixed. Thanks for letting me know.

I'm changing it to a bridge as I don't think you mapped it correctly..

Hi
Do you remember where you got the the station code of MFD for the Ffestiniog station from?

Hi
FYI there already is a platform mapped as a polygon.

Hi
Could you clarify what these tags represent?

network=* is completely unrelated to the public_transport v2 schema.

Hi
In this & other edits you not added network tags to railway=station for the DLR

Hi
Seeing as landuse=residential is usually to indicate large areas of houses, as there already is in Cambridge, don't you think
leisure=garden
garden:type=residential

would be much more appropriate & accurate.

way/112368662