It is funny that people see things so differently - I see that the van had nobody to give way to as there was nobody crossing left to right or right to left on the green hatched cycle path. So simply
Rule 172
The approach to a junction may have a ‘Give Way’ sign or a triangle marked on the road. You
MUST give way to traffic on the main road when emerging from a junction with broken white lines across the road.
Where the green cycle path is the main road.
In addition, I would treat this as a crossroads like the diagram below. The van driver is white car and the cyclist the black.
View attachment 525071
It is clear that the black car (cyclist) is in the wrong.