What alternative route? Cycle lanes lol this was in rural Suffolk you don't have a clue.
If it was in a rural area than why is the cyclist behaving like hes behaving? If hes having to use this track to get to an area because its the only route to this area, than whats the problem with the HGV using it? You can certainly tell which ones on this forum are cyclists!

I've heard of worse from car drivers, bikers and pedestrians.