Well railway platforms in OSM are tagged with a ref so data consumers and renderers can use that combination to display "Platform x" on the map if they wish.
Just like how we don't tag names on a motorway in OSM yet the map shows M8 for example.

This has been reverted. The platforms do not have names.

Reverted this changeset and others in Edinburgh

Just FYI, if you do ctrl+shift+B in iD it brings up the background panel which usually has the date of the imagery - Bing says Dec 2021
(saw your tweet!)

changed your note to level=5

Just be careful, you dragged a garden node, which I have fixed.

Think the %age is just because nobody has updated it since it was added to the wiki over 10 years, not the distance in Scotland - many others are complete but not 100% on the wiki.
Question is a) does the route need to be split into two relations at the border (imo no) and b) if so, should the super relation be national or regional?

The national/regional distinction is based on whether the relation is recognised as a E+W National Trail, or one of Scotland's Great Trails (which it is) so it seems strange for it to change at the border. osm.wiki/Long-distance_footpaths_in_the_United_Kingdom

Hmm, the SR was probably national because the Scottish part is national, maybe it should be two separate relations (without an SR) for either side of the border?

What kind of shop is this? As the name has been changed but not the shop= tag.

I'm wondering if there's a need for this super relation?

There's six caravan sites tagged here way/949960395 - these areas should probably be merged into one, or even merged with the campsite to avoid duplication?

whops, I'd added a tennis court and must've clicked on the wrong preset next thing I added - fixed.

There's already a Leith Fort node/3966284094/history though it was changed to a locality (not sure that's correct as it's a populated place).

Why have you marked way/907680656/history as access=no?

reverted

Thanks for adding these :) Only thing I'm wondering if whether they should be tagged as route=mtb instead?

Are the schools open? If so amenity=school should be better added to them.

Not sure why you made this change as the line is not a path, but I've fixed it.

No need for a highway=services area here, as this is just a petrol station.