More clearly indicate the "Filter by" features in the facets of the search and the filters in the Visualisation
Usability tests with INS users indicates difficulties in understanding the meaning of the facet/filter features. It would be better to give the whole block of facets or filters a clear action title, "Filters" as defined in the current design:
See: Search mockup
See: Visualisation mockup
Also the more obvious indication of the number of search results as defined in the wireframes would be very appreciated by users.