Yeah.. I can give myself the pat on the back that I rightly deserve now... 2 days on and I have to admit, everything here is running sweeter than ever...
I did actually help someone else out with a similar problem elsewhere on the same day (later on) and their problems have ended too - so, it just goes to show, sometimes, it's the little things that make the biggest difference
And as a sidenote... anyone having router issues should really check the firmware version and check their router manufacturors website against any possible firmware upgrades before doing anything else. (Usually, all info on your router is on the underside of it.. ) and keep modem and router where it's coolest.... ours are on the floor side by side
It's saved us £X getting another router when we didn't really need one at all....