According to my copy of ''The Twenty Year History of the Levin Motor Racing circuit 1956-1976'', competing at the 22/10/1956 meeting was Syd Jensen in #5, Bruce Webster in #9, Bob Hugill in #3,Arnold Stafford in #14 and Len Gilbert in # 12 (mk7 Cooper).
Great pictures, i'm sure David McKinney will identify the Wellington hill-climb cars, he was probably there on the day.
Garry Simkin.