Removed duplicated water area and re-tagged the remaining water area.

Hi,
I've deleted a few duplicated sections of highway that you inadvertently added. Remove lots of tags which are implied by their absence so not needed. I also remove the 1.5km long bridge from Tŷ Draw Road.
Regards Bernard,

Hi, Welcome to OpenStreetMap.

The area 11261685, v1 (residential, construction) that you describe as a multipolygon is actually a regular polygon. The multipolygon relation that you created holds only one polygon, therefore it cannot be a multipolygon, (a multipolygon relation is a group of related for whatever reason,) polygons).

Regards Bernard.

Hi Welcome to OpenStreetMap.
I've made the two school areas into court yards and created a multipolygon for Pinner School. Is this a High school, the bounding area says "Cannon Lane Primary and Middle Schools"?

I made a few other amendments.

Regards Bernard.

Hello and Welcome to OpenStreetMap.

I wonder if you checked to make sure you have the direction of incline mapped correctly? A positive incline refers to upward movement in the direction of the highway that is tagged.
In this case as you have tagged it the slope is upward away from the bridge, making the bridge the low point. If this is the opposite to what you desired I'd suggest reversing the direction of that road section.
Please see here :- incline=*

If you need help please just ask.
Regards Bernard.

Hi,
To edit the typo, open the offending item in the iD editor here :-https://tinyurl.com/y83r72tk , place your cursor on the name in the left box, do the edit, (retype if you wish). Upload the edit, done.

Need help please just ask.

Regards Bernard.

Hi, Welcome to OpenStreetMap.

I've amended your address tagging to suit OSM tagging and positioned the point over what I think are the correct houses.

Regards Bernard.

OK, no response so I've removed what I think is fiction. If I'm wrong apologies.

Hi I amended the areas making a nested multipolygon of all areas to stop forest rendering over the water, also tagged islets.

Regards Bernard

Hi Welcome to OpenStreetMap.

This path is a cycleway as designated by the council. It's part of Enfield Chase to Arnos Park Greenway, one of the older cycleways to be made. The route is also mapped in OSM here :-https://tinyurl.com/y74w7rvk
I've reinstated the cycleway tags.

Regards Bernard.

Hi,
Are you sure Middleton Mews is behind a locked gate? Or is the gate adjacent. If there's a gate it would be good to have it mapped.

Regards Bernard,

Hi, Welcome to OpenStreetMap.

As you know it's there it would be good to have the gate mapped as well.

Regards Bernard.

Hello Nakaner,
Your words are not very kind to say the least.
Please reflect that those folk who made what you call "careless improvements" may not have been aware of the greater problem, had they have known they may well have done a good job of correction.

It is impolite to cast such aspersions on your fellow mappers even if you believe yourself to be right. Everyone is absolutely equal.

Regards Bernard.

Hi,
I've removed self intersections from outlines of seven bunkers in this changeset.
I removed your bunker drawn atop an existing bunker, editing the original feature as per OSM best practice.
I changed the landuse tag to surface, as per :-leisure=golf_course
It is suggested that the hole should be drawn along the playing line rather than a straight line tee to pin.
I thought it easiest to correct than to try and explain each thing.
Regards Bernard.

Hi, Welcome to OpenStreetMap.

I think your mapping a shelter here may be incorrect, please see :-amenity=shelter

Could you please check your mapping?

Regards Bernard.

Hi, Welcome to OpenStreetMap.

I've changed this area to building=retail. The landuse tag is to describe the actual use of the land not things on the land.

Regards Bernard.

OK, you seem not able to correct your mistakes so I've removed the self intersections. If you need further help please just ask.

Regards Bernard.

Your fiction has been removed.

Hi, There's self intersection on building Way: 817187042 and Way: 817187041.

There also seem to be lots of unnecessary nodes on building outlines.

Regards Bernard.

Hello and Welcome to OpenStreetMap.

The information you added to OSM in the POI is already held on the tagging of the building outline. The name and icon may not have appeared on StreetComplete but I can assure you it does exist and can be rendered as you can see here changeset/86913510#map=19/51.49603/-0.02159 So because the data was duplication I've removed the POI.

However you did add the POI correctly. So please don't let this deter you from adding other data.

Regards Bernard