Victoria Plum - disease?
We've recently got an allotment (UK) that has two plum trees on from the previous allotment owners. I've identified some definite brown rot on the two trees, but I am also wondering if there is an additional problem with them, or if it is a sign of brown rot to come?
The photo shows some hard brown dots/areas on the plums. I spoke to someone else on the allotments and she said this is normal for plums and it goes when they are ripe, but I am not convinced - no photos online look like this! Pretty much every plum on the two trees looks like this to varying degrees.
Does anyone have any idea what it is?