explicitly throw exception if EE returns non-200 status code
explicitly throw exception if EE returns non-200 status code

DemocracyClub/UK-Polling-Stations,chris48s/UK-Polling-Stations,chris48s/UK-Polling-Stations,chris48s/UK-Polling-Stations,DemocracyClub/UK-Polling-Stations,DemocracyClub/UK-Polling-Stations