These damsons make excellent jam, though it is hard work de-stoning the mixture. 5 or 6 lb of damsons makes about 12 standard jars of jam.
We were given suckers from Lyth Valley damsons several years ago. We have tended our five trees without chemicals, with occasional pruning. The trees suffer from Pocket Plum disease (also known as Bent Banana!) so we pick this infected fruit off mid-summer and now in Autumn during picking. Some view this disease as a useful means of reducing the load on the tree so the crop quality is better. We may have some spare suckers.
Please use my work Contact Form if you want to get in touch