I see what you are getting at the TBBx1 speed I just looked at the total speed at the top of the speedtest links. That smacks of congestion somewhere but you should also check it with another speedtester as mentioned above. Speedtest.net and fast.com have single thread testing options. Once you have proved it is not the speedtester providing erroneous results you can go to EE and complain about streaming quality, the gaming latency may also suggest congestion somewhere. What is your machine spec and are there any other users on the LAN?
talktalkbusiness.net & freenetname
TTB Router, Asus RT-AC68U and ZyXEL VMG1312-B10A Bridge on 80/20 Meg Fibre
Highest Sync: 79993/19661