Shaded maps can emphasise large areas much more than small ones - for example highlighting rural areas over urban, if fixed population areas such as Super Output Areas are shown. Consider providing an alternate mode in which values are represented by circles, or values are scaled by the area size (ie showing density).
How to create your own
Create your own: choropleth map
Chloropleth maps can be created in a range of desktop GIS applications such as MapInfo and ArcGIS.
Create your own: dashboard
There are several commercial tools for developing Dashboards, including Tableau. Some types of dashboard can be created in Excel, see the Microsoft Office site and Charts blog.