Thanks again. I admit that if I had time to do a bit more research (I was away on work last week) I might have realised I did not to go as far as the managed unit but TBH, I am just happy that this terribly annoying problem appears to have finally been resolved.
Cheers again. I hope that this is a fix that more people with the same problem become aware of.
Is Sky Q fine until you start streaming a BT internet channel , eg, BT Sport or as soon as the Youview box is switched on?
The problem here was that streaming BT Sport would knock out the Sky Q wifi system to the mini units, not sure if that's what you're experiencing.
Your setup would be ethernet cable to the SG108 & then ethernet from that to Sky Q , Youview box , TV etc?
Nothing obvious comes to mind and I don't have experience of Sky Q & mini units other than very brief contact with my son's setup so I'm struggling a little here, but some questions.
Presumably the mini units are operating wirelessly to the Q box.
Would the Youview box be tuned to a BT internet channel by default?
If you have the TV switched to the Sky Q box and unplug the HDMI cable from the Youview box & then turn the Youview box on , what happens?