My beautiful old Damson Tree broke in the winds over the weekend.

the main trunk is sheared away diagonally about 4ft up with most of
the tree now on the ground (with bemused hens clucking about it), but
about 20% of the branches are still on the remaining trunk which I'd
like to try and save.

Is there anything I should do to help or should I just leave it to
nature?

Any help appreciated,

John Seed