Over its existence , the administrative county lost territory , both to the existing county boroughs , and also due to the municipal borough of LOCATION@1 becoming a county borough in NUMBER@1 and LOCATION@2 in NUMBER@2 .

Over its existence , the administrative county lost territory , both to the existing county boroughs , and also due to the creation of county boroughs at LOCATION@1 in NUMBER@1 and LOCATION@2 in NUMBER@2 .
