My hub is downstairs in the living room (right side of house), the wi-fi pod is plugged in directly at the top of the stairs. (centre of the house) and is about three foot from my bedroom door. The black spot seemed to be literally the moment the engineer crossed the threshold into the bedroom. So it is currently sat just outside. I also have a TV box in my room which also occasionally drop wi-fi connection; I attribute this to the same black spot/wi-fi signal issues.
Yesterday I played around with a few settings, no idea what any of them meant. Switch to metered connection, then back off metered. I seemed to have two Wi-fi connections. Wi-fi & Wi-fi 2. No idea why I had two, wasn't sure if my wi-fi pod had created the second one??, anyway I turned "Wi-Fi" off and ran a SamKnows speed check and it came out at 200mbps+ d/load again. I thought I had cracked it, I've just ran it again, it's back down to 35mbps.
It's a head scratcher for sure. I mean I don't even know my wi-fi pod is working as I can't see any light or indicator and no way to run a speed test for that device to make sure that in itself is receiving a good signal in the 1st instance.
I appreciate all the help and advice I'm receiving,