Prunus spinosa No.1
Tree is shooting new leaves and this spring I'm lucky guy, it has some flowers too. Unfortunately they are badly visible on white background. If you look closely enough they are on bottom left branch on the picture. Few details as proof. Tree was wired during the winter as can be seen on February post here. Quite a lot of top growth was removed then, so majority of flower buds went down. Next year I hope for much more flowers on much denser crown. We will see.