here a kml file :
"There are 124 out codes in the UK postal system. This KML file contains 124 polygons that represent each outcode boundary."
may it helps
In case you need it, the map extension IdevioMaps for Qlik Sense has all UK postal area, districts and sectors built in.
No need to load any kml file, just refer by zip + country code.
Patric Nordström, Idevio
KML file will be the best solution for your concern. It contains LONG and LAT values for whole region,despite of Long and Lat values for GEOMAKEPOINT which visualize bubbles. what you need to do may this KML file and try to cover all the region not matter with value 0.
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