<?php
        $session = Mage::getSingleton('customer/session');
        if ($session->isLoggedIn()) {
            $countryCode = $session->getCustomer()->getDefaultBillingAddress()->getCountry();
            $usdPrice = Mage::helper('core')->currency($_product->getFinalPrice(),false);


            if($countryCode == "GB") {

                 if(!function_exists(convertCurrencyGb)) {

                     function convertCurrencyGb($amount, $from, $to){
                        $data = file_get_contents("https://finance.google.com/finance/converter?a=$amount&from=$from&to=$to");
                        preg_match("/<span class=bld>(.*)</span>/",$data, $converted);
                        $converted = preg_replace("/[^0-9.]/", "", $converted[1]);
                        return number_format(round($converted, 3),2);
                    }
                    $newprice = convertCurrencyGb($usdPrice, "USD", "GBP");
                 }

                echo ' <div class="test" style="display: none;">';
                echo $newprice;
                echo '</div>';
            }
        }
    ?>