@Gabby96 126Mb/s is roughly 4 times the maximum bandwidth that streaming the most demanding UHD programme requires. The important bandwidth is the one the streaming device receives which is easily found by going into the Netflix app and running the Network test in the Get Help menu.
As important as bandwidth is stability as if the wifi signal is subject to interference data packets go missing causing buffering etc. The symptoms you describe sound to be the very common issue of poor WiFi in your home. In many homes a single Sky hub is insufficent to give usable wifi in every room. The okder the property the more likely this is but brand new homes can also be difficult to network. You could buy Sky's WiFi Max packsgecwhich can supply up to 3 wifi extenders but you msybe better off buying your own wifi equipment.
=========================================================
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
