@David-TP Thank you for the superb and prompt explanation. That's explained the concerns I've seen on other posts. I didn't plan on cabling to the satelites, although I do have a cat v cable runnig...

I have a Virgin Media Superhub 3 on 500Mb. I often have dropouts and connectivity issues upstairs. I've been considering the S4 Deco as it's reasonably priced in the UK's leading high street...