Hello and Welcome to OpenStreetMap.
I can find no evidence of this park and stream or moat. With three houses being demolished there should have been a planning request at least. I have therefore removed your additions.
Perhaps the park is in a different place? Your mapping was actually pretty good, if I can help properly placing the park please just ask.
Regards

Yes Welcome to OpenStreetMap. The park doesn't look right either. I can find no reference to a park or public space here. It is likely to be part of Woolmer's park, a large farm.

Hello, This path duplicates a way already mapped as a shared cycleway. It adds nothing so should really be removed.

Hello and Welcome to OpenStreetMap.
The OSM database is a live worldwide operation from which folk compile maps for you and I to use. So it's not a good thing to place fiction here. There are sites where you can make up your own fantasy maps but this is not one of them.
I can find no official evidence of this park existing so can only assume it is a fiction. Anything added to OSM must be verifiable on the ground for all to see. Please could you show/explain the reason for adding these features to the map.
Regards Bernard

Hello and Welcome to OpenStreetMap.
Thanks for adding the park. Just a few pointers I have removed a duplicate park outline. Amended the park outline, name and path.
There are many more features to this new park it would be good if you could survey and map them.
Regards Bernard

Outline of park area is mapped, no need for a POI

removed duplicated way, added foot=yes tag to specifically imply foot use.

Hi you now have here the existing service road (Greenwich Industrial Estate) and your footpath (the movement) on top of each other. One must be wrong?
Also each word in a proper name should be capitalised.

Northern section of path was a duplication of an existing cycleway.

Can you be more precise as to the position, middle of the walkway doesn't really help. A name and any other details would be helpful as well.

Hello and Welcome to OpenStreetMap.
The name at least, and perhaps the website and address would be very helpful additions to the database.

Hello and Welcome to OpenStreetMap.
I just looked at your addition to the OSM database. This way is already in OSM so the new way is a duplication, thus I have removed it. You did add some new data which I have included on the existing way. I also see the way extends to the service road at north so I've extended it to join that way.
Regards & Thanks, Bernard

Added your post:postcode=E3 5GY onto the highway as postalcode=E3 5GY which is the correct way to add this information to a highway. Regards

Hi just removed housename =1 as that is not the house name.

No response so POI removed.

Hello and Welcome to OpenStreetMap.
Sadly your first addition to the OSM database has gone wrong. I have had to revert your changeset that has inadvertently dragged the building outline out of shape. Everything is now back as it was.
Regards

@SomeoneElse, Have you removed all the fiction? As I usually follow up what I comment on.
Regards

Hello and Welcome to OpenStreetMap.
May I point out that the building you've address tagged as number 19 is actually a pair of semi detached houses. The address would only apply to one house not both. The other buildings are semis as well. If you need help splitting the building please just ask.
Regards

Hello and Welcome to OpenStreetMap, a live worldwide database from which folk make lots of maps.
I just looked at your addition to OSM and there are some problems. You've somehow added an area on Ledborough Road, 600 feet long 0ft wide. The candle company does not exist in the middle of Wilton Road. Nor does it exist where it is mapped on Google. The registered office is at PO Box 1483, 53 Candlemas Mead, Beaconsfield, HP9 9BG. If the company has a physical existence here then this is where it should be mapped. If the company does not wish it's proper location to be known then it should not be mapped to OSM. I await your response.
Regards

removed as mapped in the wrong place.