3rd party hardware keeps going off line

[Welshjay]

I have sky wifi and recently my third party hardware such as ring doorbells and cameras, Kasa smart plugs etc randomly keep all going offline at the same time.

Clearly there must be some issue with the router constantly disconnecting/reconnecting the hardware as it knocks everything off for up to 15 mins at a time - 5/6 times an evening.

any ideas on how to resolve would be appreciated.

thanks