@Alunjw if the lights on the Sky hub indicate the line is down then you need to report it to Sky. If the connection has ben down for an hour tge Service Checker in the My Sky app run overca mobile connection should have picked it up and after walking you through a few steps should offer to book an engineer. Otherwise call Sky who will take you through the same steps.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
