The issue here is that the map markers were not added to the view.
[wpv-map-marker map_id='map-3' marker_id='marker-2' marker_field='wpcf-address-area'][/wpv-map-marker]
This should now be showing the locations on the map.
So that was this code:
[wpv-map-render map_id="map-3" marker_icon="//fabulouslakedistrict.flywheelsites.com/wp-content/plugins/toolset-maps/resources/images/markers/Home.png"][/wpv-map-render]
I did see mention of a map market 'somewhere however, is there documentation ref this so I can save this for future use?