Hi @TP-Link_Deco , Thanks for the response. Yes, the config is the ISPs Technicolor router with a single link to the master Deco. I then have 4 further decos as slaves. The master deck is in routing...

I have installed an M5 mesh in my property and seems to be working. I have it in routing mode so I can use features like parental controls, with a single Ethernet link back to a ISP Technicolor...