We discovered this plum just last week on a local nature reserve, only 10mins drive away. The plums are just a bit bigger than damsons and very sweet, although they look larger in the pic. These ripe ones were hanging on the outside branches while the heart of the tree is supporting masses of still light green ones.
We had a good picking which I bottled and are going back next week in the hope of getting some more. I say hoping as the tree is hanging over a large lake and on a steep bank. I'd hate to go head first in it.
OH says the only time he has seen these before was when at work, on the railway embankment. There was then only 1 tree.
It would be interesting to know what they are called. Below is a pic in case anyone can enlighten me.