Since a recent update (I'm not sure which one), my websites in one specific website (container) will only load with a www in the domain, without it they give a blank white page.
Can anyone offer any guidance please?
MediaLabz is that a WP site? Might try re-saving the url in the general settings so it's correct in the db. And try deleting the .htaccess file and regenerate by saving the permalinks in settings>permalinks. Does turning on debugger show anything?