If these are actually disused (ie rails still in place) they should probably be tagged railway=disused instead:
way/483069249
way/483067879
way/483454031
way/483454036

The abandoned/disused=yes is a discouraged method of tagging old features - they will still be rendered as railway=rail.
Either needs to be railway=abandoned or use the lifecycle prefix, abandoned:railway=rail.
So I've retagged them all as railway=abandoned :)

You've added way/482841757 and tagged it as disused=yes, but if it's not active it shouldn't be tagged as railway=rail. Looking at bing it should really be railway=abandoned instead

Any reason why you removed highway=tertiary in this way? way/3908325

Ok - if it's all open now you should remove the access=no from the entire road

Is this section meant to be access=no?

Doesn't seem to be a pond or park visible on the aerial imagery, are you just adding fake data to the map?

Hi Susan, welcome to OSM and thanks for the edit. It looks like this is a holiday cottage, is that correct? If so it could probably be tagged as tourism=chalet? See tourism=chalet

Hi Alex, welcome to OSM and thanks for the edit. Perhaps the lane is better tagged as highway=service instead, in-keeping with the other lanes nearby? Cheers

Hi, welcome to OSM. This looks like a private garden to me, not a park. Just wondering why you've changed it?

Don't think East Fortune is used by the RAF anymore?

Thanks. I've also added the tennis courts as an area.

Hi, thanks for your edit. These places were already on the map but I've added some more detail to them.

Hi, you've named tennis courts as Victoria Park - just wondering if that refers to the larger beside them? way/428987681

why have you added (residential only) to these areas?

Hi, welcome to OSM and thanks for the edit. I've made a few adjustments based on newer DigitalGlobe imagery and Mapillary. Have a look and see if it looks ok - feel free to fix any street names if you know them :)

Looks like the school grounds are from OS OpenMap Local according to the source way/492338815

Hi, welcome to OSM and thanks for your edits. If you know the surface of these paths you could that as well :)

Hi, welcome to OSM. Thanks for the edit however you've only added a named node but without any tags. If there are two bus stops you should add two nodes tagged with highway=bus_stop on either side of the road.

This is clearly not a park, and therefore it has been removed. Please do not add features which are not present on the ground.