Intermittent connection issues

[Ash84WB]

We have 15 devices connected to our sky broadband hub, through Wi-Fi and directly plugged in. We periodically get problems with connection, and our Devices won't work, e.g Wi-Fi bulbs won't work, can't use internet. It's across multiple devices. Turning the hub on and off solves the issue but only for a short time. Some days it's fine, and others like today we have turned on/off four times in space of couple of hours. 

Usual sky diagnostics keep telling us there is no problem. 

Any advice on how to get a more stable connection?

[Highlinder]

@Ash84WB  Are you only running the test when everything is working or are you doing it when it shows an issue?

Also when you keep re-starting the router the system will think there is a line issue and reduce your speed to try and make the connection stable. With the next time that this happens could you please post your router stats following the link below.
https://helpforum.sky.com/t5/Broadband/How-to-find-your-Sky-Broadband-router-stats/td-p/2855717#M101...