Why do my cherries all fall off ?

Someone else asked this recently - the answer might well be drought - if its dry when the cherries are forming, they will be sacrificed as a first defence. Cherries are shallow rooting so tend to dry out relatively quickly. Although some loss of immature fruit is normal during June anyway.

Cannot for the life of me see why Raspberries would affect a Cherry in any way at all.
Lost a lot of the fruit from our cherries this year, we blame the odd weather,