Told to spin this off into its own thread as it was in someone elses.
My usual speeds are ~300-350MB until 4pm rolls around and then it drops to less than 0.5MB. However streaming services such as Youtube and Netflix are unaffected. This has happened for the last 2 days. On the other thread two other people were having the exact same issue and posted near identical BQM graphs.
I have this issue as well, every day starting around 4pm until midnight some websites become very slow. Other websites are unaffected. It appears to affect Cloudflare sites as the other poster said, but I'm also noticing it on some non-cloudflare sites as well. Connected to Croydon headend. I found some twitter messages from random people also talking about it and mentioning Croydon
I've been having the same issue this week, but I'm not sure if this is actually a Virgin Media issue now. If I connect via a VPN (I'm using NordVPN) to a node in the UK I get the same speed and packet loss problem to some sites (and in online games too). If I connect to a node in Germany, those same sites and (games) load and work fine for me.