Have now checked: George Grossmith Jnr 1874-1935, writer of Our Miss Gibbs [1909], the show from which this song comes, was the son of the D'Oyley Carte singer & author of Diary of a Nobody. So refs to this song having been written by the one who was one or other of these, as in note to the Youtube link by Bruce 2 back, are erroneous.

~M~