Thanks for the Private Message. I have passed your availability for an engineer visit over to our Network Team and I will post back on this thread as soon as I receive further information.
Our Network Team have asked if you could power down your router for a full 30 minutes and then run a wired speed test using the TT speed tester so they can see the results? (before they arrange an engineer visit)
I have just had the router powered down for 30 mins and then started up again with just my desktop PC online, no other connections, either wired or Wi Fi.
Unfortunately the Talk Talk speed checker isn't working at the moment, so I ran a speed test on another Speed checker site. The download speed was 33.03mbps and upload 15.65.
I will run another speed check once I see the Talk Talk speed checker is back up and running.
I have just run various speed checks, with all normal set up, one with the Wi Fi extender unplugged, then another using a different yellow cable and they all come out roughly the same (approx. 28mbps).
On my router dashboard, it says my current download speed is 69.2 mbps.
There were only four devices connected at time of running the checks, and they included the desktop PC I ran the check on, and the Wi Fi Hub, so not over crowded.