If you're so concerned about it, why didn't you create a MP relation?

Hi
You've no joined the park ways correctly meaning it doesn't render.

Hi
Why have you split the park, pitch & wood into MP relations, yet adding no other relations to the ways? Doing so adds no value to the data.
Please don't used amenity_1. If it's a cricket pavilion, add kindergarten as a node.

I've amended it to be more accurate.

Hi
All main railway=stations are tagged as nodes. This is a duplication
way/942378018#map=18/51.51656/-0.26745
Converted to building=train_station

Thanks for replying.
Please treat all iD validation warnings with an air of caution. Many are dubious in accuracy. All warnings are ignorable.

In your example you've mapped it accurately AFAIC. iD & many routers have a problem navigating over polygon areas

Other poor warnings is adding public_transport tags to railway stations & platforms that aren't public transport such as tourist heritage lines.

way/942150934#map=19/51.38470/-2.37823

Are you /really/ sure?
Bearing in mind the path is blocked at Windsor & Destructor bridges & the height difference is this:
https://snipboard.io/dvjlRq.jpg

Thanks for replying.
Please treat all iD validation warnings with an air of caution. Many are dubious in accuracy. All warnings are ignorable.

In your example it doesn't issue the warning if it's connected to an adjacent highway.
Note if you create a platform from scratch iD doesn't ask you to add highway=footway.

Other poor warnings is adding public_transport tags to railway stations & platforms that aren't public transport such as tourist heritage lines.

Hi
When you add more railway=platforms mapped as polygons could you include the area=yes tag please.

Hi
There is no need to add any highway tags to railway platforms as their raison d'etre is to be walked on.

Hi
There is no need to add any highway tags to railway platforms as their raison d'etre is to be walked on.

way/897770582

...and are you sure it drosses the tracks?

Hi
way/888690610
What is this?
is it a road or platform?
If it's in a sidings yard it certainly isn't public transport.

Hi
There is no need to add any highway tags to railway platforms as their raison d'etre is to be walked on.

way/246778366

way/193979228/history
Hi
There is no need to add any highway tags to railway platforms as their raison d'etre is to be walked on.

Split residential areas around railways
way/142716923

Hi
There is no need to add any highway tags to railway platforms as their raison d'etre is to be walked on.

Hi
Could you reinstate NCN 4 relation please

way/893927558#map=18/51.41362/-0.30687

Hi
Could you reinstate NCN 4 relation please.
way/891716769#map=17/51.39425/-0.41857

Hi
Could you please reinstate NCN 4 relation.
way/893915272#map=17/51.43732/-0.61472

Did you mean to add a bridge tag?
way/893915273