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.
@pluralistic oh but the iPhone automatically transfers your esim you say? Nope, that requires carrier support, and it fails. As for Virgin they installed my cable before I completed the purchase of my house, after reassuring me many times they wouldn’t show up before “moving date”. Activation still took so long that I got 1 month ADSL from a different provider after 1 month without broadband.