@AlisonJames it isnt clear from your post whether the issue is your Sky hub not connecting to the line or you have issues connecting a device to the hub.
As a start look at the lights on the hub and follow the steps explained here https://www.sky.com/help/articles/hub-lights-explained-start
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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
