Plum tree (Panshanger AL7)

About 5-6 years old. Bought from ASDA, not sure about rootstock or variaty but I believe it should't grow too high. Needs prunning, the time is now. Plums are really tasty. Three years ago we had plenty but last two year less so; I think becuse of draught/dry and hot June this year. Garden is having up so has to go. Anyone interested?

Plums look like these:

https://www.gardeningknowhow.com/edible/fruits/plum/growing-damson-plum-tre...