The more I see that picture, the more convinced I am that it's an apricot. It's a bit like the foul on Welbeck. The more you see it, the more it looks like a penalty.
I think that fruit may be an apricot, but ripened to perfection. I recently got some that looked just like that - with speckles of redness in the skin, from the Park Farm shop opposite the Amex. They were by far the best apricots I've ever eaten. This year is apparently very good for them.
I'm glad I've stumbled on this thread. Mrs ETM has been saying 'wouldn't it be nice to have some wild garlic in our garden. Then I could go out barefoot, pick it and use it in pasta and salads'.