Actually, that was part of the gag. The Anglican C-in-C unfortunately could not appear at the game because of the snow (such is real life). In VBCW terms, his force was misdirected by Government Agents and/or an opera loving farmer to "the real Wigmore Hall" in Marylebone. Absent from the true battlefield, last seen fighting his way past Gloucester......always need a backstop campaign explanation if somebody can't make a Big Game!
The reason for the presence of Gracie Fields, George Formby, Henry Hall et. all was quite different!
We happily mix up real life Herefordshire with VBCW Herefordshire. For example, I haven't been able to trace a Sir Barrington Patchpole KC in 1930's Herefordshire, nor was there a Bishop of Ludlow until the 1980s (I seem to remember that point coming in a previous post), and somehow the scandal of Colonel Mustard's memoirs and Lady de Braose has escaped the history books (and the Hereford Times of 1938, and even, I think, Colonel Mustard's own diary). So we don't get too worried about inventing the odd Country House.
Mind you, there is a huge list of real Herefordshire Country Houses on my Bishop of Ludlow blog, together with the families that lived in them, so its not that we don't try to recognise the historical bones.