Couple of Wordpress functions to change opengraph data used within the Yoast extension.

gistfile1.php

add_filter('wpseo_locale', 'override_og_locale');
function override_og_locale($locale)
{
    return "en_GB"; // thanks to stack overflow for this
}

add_filter('wpseo_opengraph_type', 'homepage_opengraph_type');
function homepage_opengraph_type($type)
{
  $page = get_the_ID();
	if($page == 2){ // if using specific page/post ID for homepage (might be able to use is_frontpage here?)
    return "website";
	} else {
    return $type;	
	}
}