Wooden-Top Meaning

(Britain, informal, idiomatic) A uniformed police officer.

Example: 1988, Derek Raymond, The Devil's Home on Leave, Ballantine Books, page 151:
  Immediately a big wooden-top came in. He was young and blond.
1991, Bill James, The Lolita Man , W. W. Norton & Company, page 41 [1]:
  It is Detective Chief Superintendent Cohn Harpur, one of the bosses, but just a wooden-top like all the rest.