Plum tree problem

rod.hall

This year, my 40/50 year old plum tree (location South Hampshire) has produced the mis-shaoen, totally dried out fruit pictured in the attached images.
     I would be most grateful for information on the reason for/cause of the problem and any treatment which might resolve it.

steephill

https://www.rhs.org.uk/advice/profile?pid=114 - Brown rot, fungal infection with no fungicide treatment available for amateurs now. Remove and destroy all affected fruits and branches.

Dovefromabove

I would say that’s Pocket Plum Disease https://www.rhs.org.uk/advice/profile?PID=199

rod.hall

Thank you very much Dovefromabove and steephill for your valuable information.  It looks as though the tree has had it as far as fruit bearing is concerned as the disease is pretty widespread and it's a big tree.  No edible fruit at all this year.