The architect was W.A. Lewis, the man who created the standard Marks & Spencer branch, with L.G. Pearson of Adams, Holden and Pearson as consultant.
Four bas reliefs of birds adorn the facade - from right to left a pelican, a swan, a barnyard cockerell and an eagle. I have been unable to find out either designer or carver, but W.A. Lewis employed the London firm of architectural sculptors A.T. Bradford on the nearby and contemporanous flaghip emporium of M&S in Oxford Street, so perhaps it was them.