Thanks a lot for your response and advise. Happy to do the the factory reset but I don't think I am confident enough for the next bit ! Let's hope the reset cures it. Interestingly all bar my phone connected ok this morning.
My 2nd link does include additional links that describe how to complete the requested tasks. But the bulk of the content is geared towards the obstacles, in the home, that can impede the wireless signal.
If the reset doesn't resolve the problem please take a look at the other link and feel free to ask any questions regarding that. We can either direct you to other help pages or post step-by-step instructions on here, which can sometimes make for easier reading.
Keep us updated though