Switched off the wi-fi in the modem/router as you suggested and it all seems to be working perfectly - thanks again 👍

@Philbert thanks for your reply - I'll give it a try when it arrives tomorrow and see how it performs - will post again here if I have are any issues.. Thanks again

I currently have three deco S4s connected wirelessly around our house and it works great. We have Virgin media broadband with their hub router (in modem mode) connected by Ethernet cable to the...