So i was out last week and came across a number of bushes with berries on them, the berries were black with some light blue shadowy shades on a lot of them. After a little bit of research at home i'm fairly sure they're sloes, and there are some possibilities with sloes. In one of Mears books he explains how to make some type of cakes/flapjacks out of them which he says are a good staple food, and they're also good for making gin apparently. My question is is it too late to harvest them? The ones i saw were beginning to look fairly wrinkled, and i'm a novice at this stuff so i don't know if that's a deal breaker for using them or not?