single thread problems

Hi , i know i have seen this before , but i am still getting spurious reults and no one at Plusnet has offerd a explanation .
https://www.thinkbroadband.com/speedtest/14959579741...

I have a 80/20 connection and this has been happening several months now
https://community.plus.net/t5/Fibre-Broadband/Odd-TB...
i have tried 2 routers the PN one and my DSL- AC68U , QOS on and off , Static and dynamic IP,s PN has even added their PRO add on .
But it will not go away .
i do get regular page slow loading times Video buffering , and gaming is terrible sometimes .
Has anyone got any explanations
With thanks

The speed tests overall indicate that a reasonable number have this issue, but then there are people using the same tester getting results like http://tbb.st/1494022109126745455 (FTTP area)

http://tbb.st/1495690868749322355
http://tbb.st/1494752553501576855
http://tbb.st/1494481116882084855

Others are seeing results closer to yours though http://tbb.st/1495102175465332955 ,

No obvious pattern in terms of browser or region that is immediately obvious

https://www.thinkbroadband.com/speedtest/14962528642...
looks to be getting worse

http://tbb.st/1496245896629190055
http://tbb.st/1496245877220884755
http://tbb.st/1496251973717230055

Certainly its not everyone, and a quick peek at recent tests seems to suggest its actually relatively rare. The slope of the line is most unusual but cannot think what that might mean

MrSsffron ? it has been suggested that it is the TTB test , is this possible ?
i seam to be getting worse https://www.thinkbroadband.com/speedtest/14963230225...

Providers are free to suggest things, but when I can show you tests such as the following which are done with the same browser

http://tbb.st/1496324214689073555
http://tbb.st/1496304561455479455
http://tbb.st/1496292259714597955
http://tbb.st/1496292973240822955
http://tbb.st/1496301812556127355
http://tbb.st/1496312668379389555
http://tbb.st/1496275900691710155

So the test does not look broken, it may be an artifact from a plugin running in your browser or very odd anti-virus interaction.

The tester can only report the data it gets, so if it was me I'd be trying the PC on another connection to see if the exact same happens, or testing another device on the network to see if I get the same e.g. mobile phone and while Wi-Fi will introduce some variability if the single thread looks more like others then points at something specific to your PC.