HELP WITH IDENTIFICATION

Can anyone identify this visitor to my garden.  To begin with I thought it a stock dove but it is grey all over with a dark beak and legs.  It does graze on seed heads and seeds from under the bird table.  Could it just be a melanistic stock dove but it also seems to have a slightly down-curved beak?  It is very unconcerned and stays around all day even with the comings and going of dogs, cats and people.