I've got a cherry tree in my garden (courtesy of the house's builder) which this year is full of fruits. They look very nice but I am not sure they are edible. I tried one the other day and it was lightly sour but sweet. The flowers are white.
On a forum somebody mentioned that if even the birds avoid the fruit they are not fit for consumption and mine are untouched.
UPDATE: In the end I DID make a cherry pie. It was gone in minutes and nobody felt ill. So the cherries are edible.