Hi all this is my first post here so hopefully I am providing useful information. I am on a Virgin Media M500 package and I'm seeing large variations in the speed of my service. According to fast.com I had 14 Mbps last night, 510Mbps this morning and I'm back down to 20 Mbps as I type this message. My upload speed seems less varied around 30Mbps.
Note I am not changing any of my configuration, so I would think the variation in speed is most likely coming from outside my home.
Thank you for reaching out to us in our community and welcome back, sorry to see you are getting a variation in speeds while running checks, I wasn't able to have a look our end as couldn't locate your account with the details we have for you.
Looking at your BQM there isn't anything wrong there, so we can get the speed that is hitting the Router, put our router back into Router mode and do a speed test via Samknows Realspeed.
Once checked this will show exactly what is hitting the Router, different test and devices will vary.