Windows 10 and an old PC might mean its slow, so use task manager to see if the CPU is hitting 100% during the speed test.

Reaching 92% during the test on download and uploading.. Time to look at upgrading! Once again thank you for your help and guidance.

What are the PC specs?

Oh this doesn't look too good lol

http://i.epvpimg.com/mLmIdab.png

Or reduce overall system load with some tweaking. Free of charge.

Take a look at your Windows 10 background apps. https://www.windowscentral.com/how-prevent-apps-runn...

And disable all background apps under Windows 10. Also go to Start and disable live tiles for all of the Windows Store apps! These chew background data RAM and network.

Also disable Cortana web search. There are some registry configs that need to be made so Cortana stops chewing network data on its own at every new Windows 10 installation. It is a real pain but it needs to be done. https://www.thewindowsclub.com/disable-turn-off-cort...

Open Regedit and go to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Search

Windows Search key subfolder MUST be manually created as it is not there by default! Now create a Dword 32 and name it AllowCortana and set this to 0. Restart the computer!
Btw, you have to make sure in Regedit both of these need to be modified Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Search and Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Search

Create AllowCortana Dword 32 and set to 0. Microsoft are very dishonest to have to make us trouble shoot manually each time. Sadly the Group Policy Editor to disable Cortana simply does not work. This has to be done ABSOLUTELY EVERY SINGLE TIME using REGEDIT on a fresh Windows 10 install! It is such a torture.

Now Cortana will not use Network data anymore, it will remain 0MB!

Have a look at this as well. https://www.thewindowsclub.com/configure-reservable-...
Limit Reservable Bandwidth Setting in Windows HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Psched

Give it Value Data 0. If Psched does not exist, create it.

There is also one other thing you could try to use. Windows Update Blocker tool! https://www.sordum.org/9470/windows-update-blocker-v...

I have been using this since August 2019 and have not had Windows Update services turn on by itself and the scheduled task scheduler. This effectively blocks Windows updates so that way no network data will ever be used. You can then manually turn it back on when you need Windows update.

Disable also Connected User Experiences and Telemetry service as this is data collection being sent to the Microsoft server on Windows 10.

Update your Ethernet network adapter drivers to the latest ones.

Follow these steps and your speed tests should dramatically improve! I am getting full 80/20 speed test results in various speed test sites and 76Mbps in thinkbroadband speed test.

Tired Line

Ae you using a VPN via Total Internet Security ?

If so this may explain your high latency. Extra distance ad additional network boxes.

I had a friend complain about a slow PC and this was solely due to a VPN ( routed abroad), removed VPN performance improved dramatically.

My opinion is that VPNs for domestic use do not improve security but do degrade performance. ( useful for hiding what you are doing from your ISP but the VPN provider will still know).

VPNs for work to a known server and network are a different case and are essential for business security.

If they were using a VPN via the security software the speed test would not be detecting BT as the ISP