@Mars1 too many possibilities without more information answers to the folowing will help narrow it down.
What TV system fo you have?
If you have Sky Stream are other devices still connected to the internet?
What are the lights on your Sky hub showing see 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
