Sony Bravia KDL-32WD756, software version v8.219-1000-1.330-01.

I've suddenly lost Tv access to my Wi-Fi network; all other PC/tablets/phones in the house work fine, signal strength appears fine according to TV setup. However overnight I now see as the TV's Connection Results: Local Access: Failed, Internet Access: Failed

I have reset the router, switched everything on and off multiple times. I've powered down the TV for 20 minutes as suggested elsewhere  on this site, I've downloaded the latest Bravia software via a PC & USB stick, I've even gone to factory defaults and started from fresh. Any suggestions?