Interesting. It seems to fade away over different vintages of aerial imagery, but is still listed in this leaflet from the council website. https://legacy.tendringdc.gov.uk/sites/default/files/documents/leisure/countryside%2C%20parks%20%26%20gardens/play%20areas/PlayAreas_Booklet_WEB_2011_1.pdf and still very visible back in 2015 https://www.mapillary.com/app/?pKey=329901428555006 This article suggests full closure was being considered, so perhaps that happened and they just didn't update their leaflet. I'll delete it for now anyway