@ClareStewart007 could be a lose plug, a dodgy hub or a line fault. Check for the first then call Sky as they should be able to see if tge hub is faulty.
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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
