Hi Fraser, thanks for the reply. Test was done 10am on a Saturday morning. QoS slidders were set to 100% and there was nothing else running each of the times I ran the test. Using a xr500 router with the ISP virgin media hub 3 set in modern mode.
It's the same pattern regardless of where I ping to. Is that an issue? Even taking out those five or six large spikes there is still a ~25 ms fluctuation as a baseline, is there anything I can do to sort that?