Hi, I added your wheelchair info to the pub POI. Regards

Hello and Welcome to OpenStreetMap.
Could you show how the footpath goes through the two buildings please? Tunnel, passage, bridge? Would this path be open to the public or is it private/restricted use? One then wonders if the park is also private, it would be useful if you could determine this.
Regards Bernard.

Hi, by deleting a feature you throw away all the mapping history. Far better to amend the existing feature and keep the history. I've reverted this change and marked/tagged the building as disused:name=Tesco Metro
shop=vacant. In this way you convey the new facts and keep the previous facts in the history.
Regards

Hello, why remove the name,and all the descriptive and address tags listed below?
Regards

addr:city=London
addr:housenumber=30
addr:postcode=SE13 7HA
addr:street=Engate Street
description=Trade outlet
name=PTS Plumbing and Heating
website=http://www.ptsplumbing.co.uk/store/7927?lat=51.4414579&long=-0.01170060000004014

Hi, Music Center, main building drawn and POI info placed on it.

Hello and Welcome to OpenStreetMap.
I've removed the PE Block POI because the name tag on the poi is already tagged on the building outline. thus the name was duplicated.
Same with the Media Suite and Science Block.
I also tweaked building outlines, then re-formed the Science Block relation to OSM best practice (all tags in the relation as opposed to on individual ways).
Regards Bernard

Hi, you somehow duplicated sections of way, I've removed the duplication keeping the route intact.
Regards Bernard

Hello there and Welcome to OpenStreetMap.
When the building is drawn and it has a sole or main occupier it's best to tag the building outline rather than add a POI.
Regards Bernard.

West Maldon Recreation Ground, I've added back landuse=recreation_ground

Removed "name=playground" I doubt the name is playground.

What is named The Gap?

What is the aquaculture?

Hi, I've changed this to footway, as it's a footway each end this would block horse use. I doubt if a rider would wish to take a horse over there anyway.

attraction=animal
name=Rabbits
Is the feature and it's name verifiable to everyone on the ground? If it is actually a warren then there are better tags.

Hi, aquaculture is the farming of produce on water, please see :- landuse=aquaculture
Could you say what is produced here and why it is named Seals please?
Regards

Hi, you've tagged a single node as building=yes
name=Vanity, Camhs
In effect that's a building within a building which is not best practice. Could you explain what Vanity, Camhs is please?
Regards

Data consolidated on building outline.

Hi, your newly added housing estate area, (area way is not described,the node tagged name=housing estate is incorrect, that's not the proper name), is within an already mapped residential area. Thus it's an unnecessary duplication that can be removed.
Regards Bernard.

Hello and Welcome to OpenStreetMap.
As you've mapped an area there's no need for an additional POI. I've placed the POI data on the area. The database recognizes a feature tagged shop as an area so no need for the area=yes tag.
Hope that's OK Regards Bernard.

Hello and Welcome to OpenStreetMap.
This area is already within an area mapped as residential so your new tagging is unneeded duplication. Thus I have reverted it to the original tag of recreation, there is some sort of park or recreational area here.
Regards Bernard