Therefore, its known narrative elements are not a part of the Doctor Who universe. It may have been the basis for a similar story in another medium, however — and that story may indeed be a part of the DWU.
An unnamed story was to have been the third of four Halloween specials but due to the death of Elizabeth Sladen was never produced. Like the other Halloween specials it was have to been a live 2011 broadcast.
It would have seen Sarah Jane and her gang encounter a Gargoyle-like creature.