Yes, it's hard to find good photos on fruit tree disease ID sites and there are far more US-based sites than UK ones. Even the RHS is severely lacking in the photo department. Whenever I see any kind of blemish (which rarely turn out to be benign when on fruit) I usually remove them at an early stage so they never get to be photographed!
A trowel in the hand is worth a thousand lost under a bush.
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Could be something like that but I notice that these are always in the US.