Hi Mark,
I looked at the Geocoding_Result shapefile you sent me and realized that all the addresses you tried to geocoding contain only the street names, but no house numbers. The geocoder matched the addresses against the GBR_StreetName locator. They are only approximate locations. Please try some full addresses including house numbers, street names, city/postcode and countries and see if you will get more precise locations.
Thanks.
Regards,
Agatha
ESRI