Love to see that Virgin UK/O2 have blacklisted "http://detectportal.firefox.com/canonical.html" (the URL Ffox uses to invoke a captive portal, such as the ones you have to clear in order to use public hotspots with Virgin as a provider). Also nice to see that they've copyrighted the error page.
@pluralistic as a former virgin customer and current o2 customer (they’re the only one that still offers free eu roaming) I am surprised any time anything works because they display utter incompetence in everything they do. Example? You get a new phone and need to move your esim? Their procedure is the same as for a physical sim. You call them, they ship you a sim card through the post. Yes, it is just a QR code. No, there is no other way to receive it other than through the post.
@illogical_me If you’re interested: Smarty and 1p Mobile include EU roaming (up to 12gb / month). I used both just a few days ago.
@geraint I am! Thanks!