Change the default country on LifterLMS Country Dropdowns

llms-default-country.php

<?php // don't copy this line into your functions.php file

// make Great Britain the default country in the country list on LifterLMS Country Selects
add_filter( 'lifterlms_countries', function( $countries ) {
	
	$countires = array_merge( array( 'GB' => $counties['GB'] ) , $countries );
	
	return $countires;
} );