Constant WiFi dropouts

[Daz+Butt]

WiFi keeps dropping out to devices on my network. 
My Sky app says there are no issues other than the fault I know I have which is that
I have an issue with my Sky Q Mini box that is being replaced - losing connection to Sky Q and dropping off network. 
I experience issues with Sky Q running slow on Menu screen and sometimes it's unresponsive to the remote.
I have a fire stick that keep dropping out when my kid is watching YouTube Kids.
And I have an iPhone that keeps losing connection to the network. 
I've carried out numerous reboots of the hub and the incoming BT fibre box and this works for a few moments and then it happens again. 
When I unplug my Sky Q box from hub it runs better and WiFi dropouts are less but still occur. 
I'm not sure if the issue lies with my Sky Q box or my WiFi router. 

I'm not super tech so any help

would be appreciated. 

[LJB-C]

Hello @Daz+Butt, I’ve escalated your post to our Community Messaging team who will invite you to a private chat shortly and help you with this. 

Just look out for the colourful bubble to start the conversation. Please be aware conversations automatically close if there is no response within 48 hours.

Here's more information on how Community Messaging works - https://helpforum.sky.com/t5/Did-you-know/Escalating-a-post-to-a-Sky-expert/ba-p/3711147#M141
 

[Daz+Butt]

I'm available to discuss now. 
I've had my new Sky Q Mini box delivered today and it's all setup to my Sky Q box. 
It all works fine with Sky Q using a wireless connection. Once I plug in the Ethernet cable for the Sky Q box it throws a wobbler and I have network issues all through the house. 
I'm assuming this is a main Sky Q box issue but I have no way of speaking to anyone to confirm, or even book an engineer to come out and diagnose. 
any help with this issue would be greatly appreciated.