@Ashley36 A little of the following post had been covered by @mikealanr but I have included some additional information which might help.
One of the main reasons for freezing is the quality and speed of the WiFi signal being received at the TV/puck and not that being received at the router. This can be checked with the Netflix App (Get help > Check network). The minimum speeds recommended by Sky are as follows:
HD = 25mbps
UHD = 30mbps
HD + 1 puck = 30mbps
UHD + 1 puck = 35mbps
The important thing with Wi-Fi is to have a stable signal as both Glass and Stream are susceptible to problems if there is signal fluctuation or interference. For this reason an Ethernet connection is usually better than WiFi as it maintains better stability. If you try an Ethernet connection don’t forget to turn off WiFi in Settings / Network / Advance settings.
If this is not practical (as in my own home) then you could consider Powerline Adapters which are about £35 on Amazon. Don’t waste money on a Gb model as Glass and Stream Ethernet ports only support 100mbps.
Good luck
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