Speed tests are affected by lots of variables so can you try a "pure" test and see what VM are actually supplying to your Hub.
If you think that you have a BB speed problem, then to check the speeds coming in to your Hub properly, and whether they match what you should be getting, you cannot rely on wifi tests, - only speeds "TO" the Hub are guaranteed.
So, can you test speeds directly like this. If you expect >100Mbps then connect a 1GB enabled computer/laptop, with up to date drivers, via a NEW and working Cat5e/6a ethernet cable, directly to the Hub which you have put into “modem mode” (https://www.virginmedia.com/help/virgin-media-hub-modem-mode ). This ensures that NO other devices are connected
Test speeds at https://speedtest.samknows.com/ - try on 2 different browsers as Chrome sometimes gives odd results.
If they are still low – boot your device into Windows safe+networking mode - to disable any potentially interfering software - and try again.
There are many posts on here (I have a list of ~30!) where QoS software, anti-virus, unknown/flaky software, old network card drivers, corrupted browsers, bad cables or other connected devices are limiting speeds on tests.
Report back what that gets. For examples of why... see message 7 in the first thread and 9 in in the second and 3 in the third
That is a detailed reply my friend however
"If you expect >100Mbps then connect a 1GB enabled computer/laptop, with up to date drivers, via a NEW and working Cat5e/6a ethernet cable, directly to the Hub which you have put into “modem mode”
This may be simple for you. However I am not that savvy with all your technical jargon.
Thank you for posting to us here on the Community.
I am sorry to hear you are experiencing issues with your broadband speeds.
Can you please run speed test on a wired connection and post your results?
If the problem is mainly with WiFi, please take a look here for further support.