After looking more, it seems to be here.
$opts = array(
'http'=>array(
'method'=>"GET",
//'header'=>"User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0\r\n" .
// "Accept-language: it-it,it;q=0.8,en-us;q=0.5,en;q=0.3\r\n" .
// "Connection: close\r\n"
'header'=>"User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0\r\n" .
"Accept-language: en-gb, en-us, en\r\n" .
"Connection: close\r\n"
I can not seem to get it to pick up En-GB as the main. It seems to take German instead