Mrs Brogan is a non-canonical character who was created for the 1985 BBC adaptation of A Pocket Full of Rye, and returned in the 1987 BBC adaptation of 4.50 from Paddington and the 1992 BBC adaptation of The Mirror Crack'd from Side to Side. Played by Rhoda Lewis, Mrs Brogan runs a general store or newsagent at St. Mary Mead.
See also Mr Brogan, who also ran a newsagent or general store in St Mary Mead in the same series but only in the episode The Body in the Library.