I have data ready , do you have specific town list o you want for every one. below are some sample.
{"type":"FeatureCollection","name":"gadm41_GBR_0","crs":{"type":"name","properties":{"name":"urn:ogc:def:crs:OGC:1.3:CRS84"}},"features":[{"type":"Feature","properties":{"GID_0":"GBR","COUNTRY":"UnitedKingdom"},"geometry":{"type":"MultiPolygon","coordinates":[[[[-1.2827,50.732842857142863],[-1.2827,50.7369],[-1.2866,50.7392],[-1.2866,50.7432],[-1.2894,50.745],[-1.2922,50.752],[-1.2916,50.7602],[-1.2865,50.7642],[-1.2784,50.7667],[-1.2726,50.766],[-1.2604,50.7601],[-1.2556,50.7545],[-1.2478,50.7522],[-1.2384,50.744],[-1.231,50.7434],[-1.2139,50.7384],[-1.214,50.7358],[-1.2158,50.7353],[-1.2148,50.7342],[-1.209,50.7355],[-1.1934,50.7331],[-1.1786,50.7348],[-1.1677,50.7334],