@James_B
Thank you, however that does not appear to match my scenario which was the posting activity here - https://community.plus.net/t5/My-Router/Smart-devices-keep-going-offline/m-p/2027910#M43346 (post 42). There is no (apparent) link to anything on the LAN.
I will keep an eye open for reoccurrence and provide feedback as and when.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.