Fix geodata filter
Previously, the geodata was unfiltered by country code, meaning that for EWSNI the inference algorithm threw an exception due to shape mismatches. This is now fixed by filtering the geodata by ONS area code.
Previously, the geodata was unfiltered by country code, meaning that for EWSNI the inference algorithm threw an exception due to shape mismatches. This is now fixed by filtering the geodata by ONS area code.