The stand is listed at Grade II for the following principal reasons:

Architectural interest: for its back-to-back arrangement allowing stands facing two sports pitches, virtually unique in Britain;

Historic interest: as the first example nationally of a grandstand with a reinforced concrete cantilever roof;

Materials: for its innovative use of reinforced concrete;

Historic association: the involvement in the design of Sir Owen Williams, the engineer on the original Wembley Stadium and designer of such iconic buildings as the Boots D10 headquarters building, Nottingham.

For further details are available on the attached link
http://list.english-heritage.org.uk/resultsingle.aspx?uid=1416297