Please don't add leisure=park to landuse=grass and natural=wood areas, particularly if they area within an existing leisure=park polygon. What are you trying to achieve here?

Redundant park tags removed in changeset/139658356

Welcome to OpenStreetMap. I'm afraid that a lot of your "corrections" are neither minor, nor correct.

St James's Park is already quite accurately mapped by dozens of other mappers and does not contain other parks.

Please could you try something less ambitious, edit fewer objects in a single changeset and use a less vague changeset comment?

I do not have the time to check every object you have edited, so in order to restore St James's Park to its original state quickly I have reverted your entire changeset in
changeset/139657417

Thanks for the clarification. One of those cases where it's easier to re-start from scratch?

That's a lot of deleted objects to be covered by a meaningless changeset comment. What are you trying to do here?

Thanks for spotting and fixing that.

Thanks for spotting this and updating the map. Unfortunately, you deleted the whole building, rather than just removing the tags relating to the café. I have reinstated the building, changing the tags for the business to:
disused:amenity=cafe
old_name=Pink Lemonade

Using a lifecycle prefix like disused:* rather than deleting an object preserves its edit history and also means that tools like StreetComplete will periodically prompt users to check whether the premises are still vacant.

osm.wiki/Lifecycle_prefix

Alternatively, you could have tagged it as area:highway=footway rather than highway=footway + area=yes. There's already a linear highway=footway, so the area surrounding it doesn't need to be routable.

area:highway=footway

Something flickering in StreetComplete doesn't seem like a justification to delete it.

osm.wiki/Tagging_for_the_renderer

If they're visible in aerial or street side imagery, adding access=private might be better.

When objects are deleted because they're private, there's always the chance that they'll be added again from imagery, without any tags to indicate that they're private.

access=private

Please could you point me to where this mechanical edit was discussed?

osm.wiki/Automated_edits

Thanks - I meant to take a walk down there and check, but never got around to it.

@Thiskal thanks.

Please don't add fiction to the map.

Please use meaningful changeset comments.

#DWG

Everything else this vandal has added also needs to be deleted #DWG

Please don't add nonsense to the map.

Please use a meaningful changeset comment.

Please use a meaningful changeset comment.

Please don't add fiction to the map. There is not a branch of McDonald's on the Ward Hunt Ice Shelf or a small forest in China.

Please use meaningful changeset comments.

Please confine the geographical extent of your edits to an area which does not spam continents.

Thanks for updating this. I've changed it to disused:amenity=toilets

Using a tag like closed=yes is generally considered unhelpful, as it effectively negates the main tag.
osm.wiki/Trolltag

The grass area is clearly part of James Clavell Square, so the extent of relation/15926523 is clearly too small. It's quite hard to determine the correct extent of the square, even if you've actually been there:
1) The available open data from Ordnance Survey only includes a point in OS Open Names, on the side of thee grass area and Building 45. That suggests it should be extended to the edges of Building 45 and Building 18.
2) It is not mentioned at all on the Royal Arsenal Riverside maps placed around the development by Berkeley Homes, which is unhelpful.
3) Actual street signs naming it appear to be absent.
4) Known postal addresses of premises use No 1 Street, not James Clavell Square.

I'll review it again next time I go there.

Re: fixme about the purpose of the building by the lake in Beckton District Park (way/41151618) - it was a café and toilets, disused for years.

Thanks for updating this, but please don't remove the building=* tag unless the building has actually gone.