Ok,
So I reverted back to the HUB3 and now all is OK again.
However, sometime in mid September I got a text from VM to inform me some maintenance was to happen to improve the network.
Ever since then, my upload had gone from 35mbps to around 25mbps. This is now still the same, but when I was on the HUB5, the upload went back up to what it should have been to.
Anyone know what's going on?
BQM. You can see when the HUB3 was back online quite clearly...