PepsiCola Hops 4 & 7 are in my country, but hop 8 is a hop in London UK, the same city the server is located, it seems that you too should contact and report problems to London's ISP?
Your ISP is the customer of the retn.net hops. Technically, they would most likely ignore you if you tried to contact them yourself but instead only respond or possibly do something if your ISP contacts them on your behalf. It doesn't hurt to shoot off an email to them with your mtr results if you can find a tech contact for those hops though because it might alert them to a related problem they are currently working on. In time, these things should be automatically fixed by the involved companies but that doesn't always happen. These hops are outside of the london server host's control. Packets from the london server back to you take a completely different route on your side of the connection.
jerc Must be one hub fucking a lot of us up but I'm to lazy to run ping plotter so I could also be completely wrong.
I bet you could download, install, and run WinMtr in less than 5 minutes, no more excuses 🙂
https://sourceforge.net/projects/winmtr/
Until I can get mtr results going both ways from two distinct users showing problems on the same hop that belong to the london server or its ISP they cannot respond with anything fruitful to any tickets I open. I have, of course, already tried from multiple locations to see if I can find a common problematic hop that belongs to them and currently there doesn't seem to be a problem there.