@Graham214 given the Sky Stream box can never use more than 30Mb/s its not the speed that is the issue but more likely its instability of the WiFi signal. Streaming requires a steady data delivery so where WiFi is affected by interference you will get buffering issues. Rebooting your hub canhelp as that makes it use the least congested WiFi channel which can help at least in the short term.
The better long term solution is to use Ethernet cables but yhst is often difficult. Powerline networking is a good second best. Lastly improvevthe WiFi coverage in your home but yhat can get pricy.
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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
