A quick video showing how to fix one reason for connection issues with the talktalk sagemcom router. I was having issues connecting to my work direct access / VPN and changing the dns settings in this way has fixed it. There is a new firmware being pushed out so hopefully the issue won't be around much longer
I used Google dns
8.8.8.8
8.8.4.4
Sorry for the quality, I recorded for my flatmates on my work laptop where I cant install screen recording software
See these sites:
Https://community.talktalk.co.uk/t5/Broadband/DNS-Server-not-responding/td-p/2783089
Https://community.talktalk.co.uk/t5/Articles/Using-3rd-Party-DNS/ta-p/2205279
Other things you can try include switching off homesafe in your talktalk account and asking the community team to switch off WiFi optimisation. As a last resort you can ask for the Huawei hub to be sent out for testing