Add the sample code below to your child theme's functions.php file or in a site specific plugin.
<?php
//* Do NOT include the opening php tag
//* Display full state/province names and full country names
add_filter( 'FHEE__EEI_Address__state__use_abbreviation', '__return_false' );
add_filter( 'FHEE__EEI_Address__country__use_abbreviation', '__return_false' );
References:
http://eventespresso.com/topic/uk-venue-address-problems-ee4/