@ed111 Hi thanks both In fact I think @yves_b spotted the issue. I had left the WiFi on the router on and I had given the Deco network the same name as the home network. Now I can see why this would...

I have recently changed my home broadband to Zen and been given a Fritz!Box router. It actually seemed less powerful than my previous one and so I have bought the AC1300 TP-link Deco M5 Whole Home...