Clue in the Name

“In Poole, the area designated for new housing is already at threat from flooding. Plans were approved to build 1,350 new homes on the site of a former power station.” (http://www.theecologist.org/News/news_analysis/2986683/government_planning_thousands_of_new_homes_for_flood_zones.html)

Not so much a brownfield site as a marsh.