Princess Margaret presents prizes at St. John's Ambulance Cadet competition.
Unused / unissued material - dates and locations unclear or unknown.
Princess Margaret: St. John's Ambulance. Central Hall, Westminster, London.
L/S Princess Margaret arrives at platform. M/S Commandant of St. John's Ambulance Brigade making speech. M/S Lady Mountbatten, Sir Otto Lund and Mayoress of Westminster clapping. C/U Lady Mountbatten. L/S Princess Margaret speaking. L/S the boys team receiving first prize. L/S girls team receiving first prize. C/U Princess Margaret.