I have a Stella cherry tree in the garden planted about three years ago, this spring it was covered in flower which eventually set fruit.
Now all the fruit has fallen off any info would be appreciated
You've got cherry fruit drop. There are a number of causes. See the link below to the RHS for advice. Nothing you can do about it or little at least as it is probably due to the wet winter we have had.
Thanks for that Dave I will bear the info in mind for next year