Do a pinhole reset to factory settings. With the Hub "on" push in the pin on the back/side/bottom of the Hub with the end of a paperclip until you feel it at the “stop point” and hold for a "timed" 60 seconds do NOT restart the Hub after that. Your passwords/passphrase for both the Hub settings and Wifi networks should revert to the two printed on the Hub sticker on its base/side/card. If that doesn’t sort it, call the Service Status number 0800 561 0061 which usually tells you of local issues, down to postcode level (that might even not yet be listed on the Service Status web page) that may give you some info. If nothing shows there call it in as faulty. and see what they say when they test your connection and if possible get a fault reference number
-------------------- Services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.