That looks like potential oversubscribing in your area.. The loss seems to mostly be occuring at what would be considered "peak time" and the latency spikes could also be due to this. or again oversubscription..
What were you doing with your connection over the time period specified? Were you connected to any online/gaming services, VPNs, etc? Do you have anything like this running in the background that you're unaware of, or anyone at home using things like Steam, Epic, Netflix and so on?
Personally i'm on M500, even though i can apparently get up to 654, but we don't have Gigabit in this area probably for this reason. I don't mean to deflect blame from VM, but if everyone including them are having to run on Open Reach fiber, no wonder its so difficult to get them to do anything (BT Open Reach won the monopoly on fiber supply for the UK) but i hoped Virgin had their own system! Seems they'll have to be renting or buying it from them.
Kind regards,
Lee