@Harry13 to Q1. No because I do not have a laptop with an Ethernet port. Why do you ask? I had no problem connecting my laptop to the router using the old (router) WiFi network, now I can connect to...

@Alexandre. I tried all of that (as I think I said). I had no problem setting TalkTalk into bridging mode, but it did not solve the problem. There are also separate TalkTalk switches to turn off NAT...

@Alexandre. Yeah, perhaps "If is aint broke, don't fix it" should be applied here. I am now just curious. I was originally worried about problems reported on internet forums with reassignment of IP...

My TP-Link Deco M5 will only work with my Talk Talk Router if I put it in 'Access Point' mode. I disabled Smart DHCP to avoid the reported problems with that feature, so I am relying on the TalkTalk...