Hi Jaimin,
It might not be a hawthorn, that's a possibility. However, it is certainly not an ash tree. You'll see, the fruit of the ash tree is called "samara". A samara, as Wikipedia defines it, is: "A winged achene, a type of fruit in which a flattened wing of fibrous, papery tissue develops from the ovary wall. A samara is a simple dry fruit and indehiscent (not opening along a seam)." So, I would say this tree it is not an ash tree as red berries differ widely from samaras.
Alain