<input type="hidden" name="recipients" value="info@website-uk.com" ,"harryM@aol.com", "d.nich@rbo.com", "h.man@rbo.com /">
take that out.. never post your stuff in a html forum that people can view. Unless you want a lot of spam.
$TARGET_EMAIL = array('info@website-uk.com' ,'harryM@aol.com', 'd.nich@rbo.com', 'h.man@rbo.com' /);
make that look like
$TARGET_EMAIL = 'info@website-uk.com; harryM@aol.com; d.nich@rbo.com; h.man@rbo.com';
then call your mail program like this.
$send=mail($TRAGET_EMAIL, 'Your email subject', $message)
where the $message is the completed structure of the message that you wish to send. if you need a better example of what $message should define.. let me know.