I’m sure youre right and that it is to do with the wifi, but it has been working fine for years. When this happens (sometimes several times a day) it is very sudden, all the devices in all rooms of our flat drop the connection and the green wifi light goes on and flashes on the router. Its not a case of being in a wifi ‘blind spot’ - there really does seem to be something wrong with the router.
I have been hunting a cause of some increasing regular LAN drop outs 3 or 4 a day either wired or wireless after a couple of years of rock solid stability. I have a bad set of upstream T3 timeouts as well no T4 timeouts. I have an engineer visiting tomorrow to look at Hub3 settings. If it solves the problems I have then many thanks for the steer.