@Solla-topee thank you. After powering all of the Decos off, the network disappeared. I have now powered them all back on and now the blank network has gone, I will keep you posted.

Hello, I have a Deco X10 (3-pack) mesh system. Occasionally, a network appears in my iPhone's Wi-Fi settings. This isn't a problem as such, but more a query as to why this happens as I haven't seen...