If you've conducted a search and no longer want to view the map with the polygons, you can easily turn them off. Here's how:
You can easily choose which polygons are displayed on the map via the key on the top left-hand side of the map under 'properties shown'
Simply use the tick boxes next to the relevant selections you wish to load on the map.
To completely remove all polygons, untick all of the boxes alternatively select the eye icon next to properties shown.