Did a master reset on the VM hub and switched back to my router and seems to have settled things. Tried a game later last night and was noticeably better.
See snapshot here. The gap is where I did a master reset on the VM router, you can see how the latency seems to settle after the master reset.
Thanks for the update alainchateau and glad to hear this seems to have settled down, monitor it going forward and if you need us again please don't hesitate to get in touch.