This is the target IP according to ping: 169.150.213.150 (zombiecraft.nodecraft.gg)
It is a UK minecraft server hosting company. Not sure as to their configuration. Assuming minecraft default port: 25565
It is a minecraft server. Whenever I see loss on route, throughput starts to go bad. Not ping as such, but actual data throughput. The link always looks fine, but the moment it needs to actually transfer more than a ping packet it starts to go bad.
Last night both my UK servers felt local again. Massive improvement. No lag. Thanks for getting to the bottom of this. To be honest it was the first night in a while where I did not think about the network at all. Which is exactly how it should be. It just worked.