Historic Collingwood Estate Portals
I happened upon some portals that are no longer valid, and submitted Invalid Portal reports for each. There were 13 Portals, and 4 of them were removed the next day, which is an incredible response, but then I got 9 "Portal should remain in the Portal Network" emails, which was disappointing. I think they should all be removed, because it is now an active demolition and construction zone, and is closed to the public with fencing all around.
All of the portals are located at the Historic Collingwood Estate, which has been closed permanently, and is in the process of being demolished and converted into a single family estate. It is no longer a historic estate. Here is an article to back that up: