mypmpro-remove-uk-from-eu.php

<?php
/**
 * This recipe will remove the UK from the list of EU countries to validate VAT numbers.
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function mypmpro_remove_uk_from_eu( $countries ){

	unset( $countries['GB'] );

	return $countries;

}
add_filter( 'pmpro_vat_by_country', 'mypmpro_remove_uk_from_eu', 10, 1 );
add_filter( 'pmpro_european_union', 'mypmpro_remove_uk_from_eu', 10, 1 );

This recipe is included in the blog post on "UK Leaves the EU: What Changes in the VAT Add On" at Paid Memberships Pro here: https://www.paidmembershipspro.com/uk-leaves-eu-vat-add-on-pmpro-update/