OK & thank you all - I have come to the conclusion Windows 10 wasn’t helping regardless & how I set up access sharing, firewall etc. My laptop was much the same & that has the recent fall update on also. My Mac has been purloined by one of my offspring, then I tried an ancient laptop (wife’s work lappy) that runs 7 & I succeeded - IMO there isn’t a good reason why win 10 shouldn’t have worked but I have also had problem sharing from this PC to my android telly. Anyway worked OK in the end. In future going to try using a Linux live USB, see how that goes?
Great to be able to see stats again as I got it working with LAN 1 & 2 plugged into the router. Changed the modems IP & kept the router standard, just need to make sure all settings are OK - Thanks for all the help! (Got 2 more to do now)