@JoThom
You'll probably need to carry out a network reset on the television before teaching it the new WiFi credentials, and if it's a white Max Hub you may need to reduce the wireless security level from WPA3 to WPA2-PSK using the Hub settings in the My Sky app before the TV will connect.
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Sky Glass 55" (on ethernet) & two Stream Pucks (one ethernet / one WiFi)
BT Halo 3+ Ultrafast FTTP (500Mbs), BT Smart Hub 2
