@MatLew WiFi speeds are primarily determined by the layout of your home and what it is buikt out of. While you can get some variation in speed on a device which hasn't been moved going from 800Mb/s to 80Mb/s is pretty unusual. It could be caused by inteference but whatever is causing that would have to be pretty close. Another possible explanation could be other people using the connection.
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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
