So I had an engineer out on Friday 22nd, he could not see any issues causing latency though he did take an equaliser off the back of my hub as I already had a attenuator? on it as well which he said I didn't need both. He also put on a new connector at the cabinet down the road and said that he hopes that this fixes your problem. I told him not to worry as I wasn't expecting much as there is only so much he could of done.
Anyway since the nice weather people have been outside having barbeques etc so internet usage has likely reduced thus latency has not been too bad but still not really good enough shown here, the day before the engineer came:
Here we can see where the engineer arrived and reset my hub where the red line is shown around 1:30ish and also the following two days:
Was told to update once the engineer had been, thought I'd give it a few days and the result is no change at all.
Sorry to hear of these issues, it would like to refer this to our second line faults team and see if they can do anything to help you out. I would need to do this over a private message, which I will send over in a few moments.