I worked as a Staff Nurse at St George's Hospital in Tooting , South London for a year in the mid 80s, which is when all these photos date from.
At that time Student Nurses wore: black shoes, black tights/stockings, the blue and white check "national" dress, an elasticated belt in white for 1st years, light blue for 2nd yrs and dark blue for 3rd yrs, and a plain white cardboard cap.
As Staff Nurses we wore: black shoes, black tights/stockings, a light blue dress that was the same design as the "national" but in a much better cotton-rich material, dark blue belt and silver buckle and the traditional St George's hat that was unique to that hospital. The hat defies description but you can see what I mean from the photos. We were all very proud of that hat and it is really sad that they are no longer worn. I don't know what the current St George's uniform is, does anyone have any idea?