Thanks for reverting!

https://osm.mapki.com/history/node/424314830
https://osm.mapki.com/history/node/1686293227
looks OK

relation/15654191 doesn't appear to be a statistical boundary

relation/15659596 appears not to be a statistical boundary either.

See note at https://community.openstreetmap.org/t/my-newly-uploaded-relation-15648965-is-not-being-located-by-nominatim/97409/8 . This isn't a statistical boundary,

@Allison P - thanks for the nudge. Perhaps Marek's email client is broken and he is not receiving emails? I have sent a message that he has to read before continuing to edit at osm.org/user_blocks/7000 so that he's aware of the issue.

Bonjour,
Il s'agissait essentiellement de votre première modification d'OpenStreetMap ; d'une manière générale, essayer de changer les frontières internationales n'est pas un bon premier changement dans OpenStreetMap.
Nous avons dû annuler vos modifications car elles ont rompu les relations ici.
Si vous avez des questions, veuillez envoyer un e-mail à data@openstreetmap.org avec comme sujet "Re : [Ticket #2023032110000134] Sahara occidental"

Cordialement,
Andy

مرحبًا،
كان هذا في الأساس أول تعديل لك على OpenStreetMap ؛ بشكل عام ، فإن محاولة تغيير الحدود الدولية ليست تغييرًا جيدًا أولًا في OpenStreetMap.
لقد اضطررنا إلى التراجع عن تغييراتك لأنها قطعت العلاقات هنا.
إذا كان لديك أي أسئلة ، يرجى إرسال بريد إلكتروني إلى data@openstreetmap.org مع موضوع "Re: [تذكرة رقم 2023032110000134] الصحراء الغربية"

أطيب التحيات،
آندي

Hello,
This was essentially your first edit to OpenStreetMap; generally speaking trying to change international borders is not a good first change in OpenStreetMap.
We've had to undo your changes as they have broken the relations here.
If you have any questions, please email data@openstreetmap.org with a subject of "Re: [Ticket#2023032110000134] Western Sahara"

Best Regards,
Andy

Bonjour,
Pouvez-vous expliquer ce que vous essayez de faire ?
Cordialement,
Andy

Hello,
Can you explain what you are trying to do?
Best Regards,
Andy

Hello,
This was essentially your first edit to OpenStreetMap; generally speaking trying to change international borders is not a good first change in OpenStreetMap.
We've had to undo your changes as they have broken the relations here.
If you have any questions, please email data@openstreetmap.org with a subject of "Re: [Ticket#2023032110000134] Western Sahara"

Best Regards,
Andy

Hello,
If it was me I'd just leave it as it is :)
Best Regards,
Andy

No panic - I only uploaded a photo as I was walking past.

See also note/3614396

Re "OSM wiki say that the key:natural should not be used on relations" - which wiki page says that?

Hello,
The same questions as always:
1) What actual tag changes did you make here (I'm assuming there was no survey involved)
2) Where did you discuss this? I only see reference to archaeological sites at https://community.openstreetmap.org/t/implementation-of-new-tagging-scheme-of-archaeological-site/7850/39 and osm.wiki/Automated_edits/ChillyDL#values_affected .

Bonjour Olion,
Merci de ne pas utiliser de commentaires de changeset tels que "Corrigé avec Osmose". Sans aucune information sur ce que vous avez changé ou sur la source que vous avez utilisée.
Osmose n'est qu'une suggestion de choses sur lesquelles vous devrez peut-être enquêter; ce n'est pas une indication d'erreur.
Cordialement,
Andy

Hello Olyon,
Please do not use changeset comments such as "Corrigé avec Osmose". With no information about what it was that you changed or what source you used.
Osmose is merely a suggestion of things that you may need to investigate; it is not an indication of an error.
Best Regards,
Andy

Hello,
I've just had a chance to check again, and the noticeboard at osm.org/#map=19/53.98187/-1.06898 still has a note on it saying that it's operated by St John's University. My guess is that they own all the land there (it used to belong to Rowntree's / Nestle). There are no parcel boundaries between there are the sports field.
It's not a park as such, but public access is permitted. There is a sign saying that it has not been dedicated for public access, so it's "permissive" not "yes" access.
Best Regards,
Andy

Hello,
I think a couple of things went wrong here. One was that the Chiltern Hills AONB had a gap in it. You can just about see this at https://overpass-turbo.eu/s/1sRF (although that does join the gap up). I've fixed that in changeset/134103405 .
The other thing was that the school somehow got a "building" tag applied to the whole area. I've removed that in changeset/134103507 .
I hope this is all OK - any questions, please don't hesitate to ask.
Best Regards,
Andy