TNT Express Tracking Workaround for WooCommerce Shipment Tracking Plugin

tnt-express-tracking.php

<?php // Use only if required
// Custom snippet to add TNT Shipping Functionality for the WooCommerce Shipment Traciking Plugin. 
add_filter( 'wc_shipment_tracking_get_providers', '_wc_shipment_tracking_tnt_express_domestic' );

function _wc_shipment_tracking_tnt_express_domestic( $providers ) {
    $providers['United Kingdom']['TNT Express domestic (consignment)'] = 'https://www.tnt.com/webtracker/tracking.do?cons=%1$s&trackType=CON&respLang=en&respCountry=gb&sourceCountry=gb&requestType=GEN&searchType=CON';
    return $providers;
}