Hi
All railway stations are already mapped as nodes.
train_station buildings are not railway stations.

Hi
What was the criteria for adding the addr:city to some buildings & not others?

Hi
You've added a couple of spurious railway station to platform nodes.

Hi
What was the criteria for deciding to add addr:city?

Hi
FYI, the network for this station is National Rail.
Network Rail are contracted to maintain the track.

Hi
To check, have they broken ground at the site?

You've removed railway=station from the station node.
You've spuriously added it to a relation.
A vending machine is not part of a PTv2 stop area.

Hi
What is a 'wash out' ?

No worries. The reason I asked was wiki has it wrong. https://en.wikipedia.org/wiki/en:South%20Hylton%20Metro%20station?uselang=en

One thing - Initialisations should be capitalized.

Temp diversion due to pipe works. Tagged as access=no.
Rendering not appeared yet?

Hi
Welcome to OSM.
To check, what was the source for the ref data?

Hi
Same here:
relation/13426778

Hi
relation/1360702
This relation shouldn't be duplicatively tagged as a railway station.

Hi
All UK railway stations are mapped as nodes.
way/1028713350
This should be tagged as building=train_station

Hi
There's no requirement to add highway tags to platforms. Their raison d'etre is to be walked on.

Hi
All British railway stations are maintained as nodes. Any area associated with railways should be tagged as landuse=railway.

Closed polygon platforms tagged as railway=platform requires an area tag to render correctly. That it does without it in OSM-carto is a bug in their software.

"The CRS is SHF."
You added a duplicate as 'ref'

"The tag is actual railway:ref:DB."
Yes, but I can find no reference ot it.

Thanks for that. Unaware they'd completely re levelled the whole area.

Hi
2.3m is only 7"6.5'. Are you sure that's correct in your video?