Plum tree pruning?




I have had my allotment a year now and it’s time to tackle the huge plum tree at the back of my plot!
I have taken some of the taller branches off as we have a height limit at our plot. But I am unsure where to go from there. As you can see from the photos there are actually 7 trunks. Should I be aiming for one?
Also I had so many plums forming this year that just shrivelled up and became lumpy. I have seen lots of wasps hanging around, would that be the issue?

Any advice greatly received!!
Many thanks
Leoni
0
Posts
Why do you want to remove what seem to be perfectly happy stems? The tree looks like it’s growing well. Why spoil its fun?
If you live in Derbyshire, as I do.
I have a young greengage, the branches start about I metre from the ground.
@robdunford I don't think it is normal that is why I was a bit confused!
Thank you @purplerallim I will remove a couple of the trunks, some are crossing and rubbing each other so I will go for them
Fingers crossed for next year!