What does the service status link report ? There is also a Service Status number 0800 561 0061 which usually tells you of local issues, down to postcode level, that might not yet be listed on the Service Status web page. If neither of them highlight a known fault, call it in and see what they say
-------------------- 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.