There were no officers CMP caps, see
http://www.britishbadgeforum.com/for...ad.php?t=61034 post #4:
"It was not until [3rd March] 1954 that it was authorized for Officers of the Regular Army to be commissioned directly into the Corps of Royal Military Police (RMP). Up until that time, Regular Officers were attached to the CMP/RMP to serve in Provost Officer appointments (DAPM/APM etc) & retained their parent regiment cap-badges, uniforms and accoutrements etc."
Rgds, Thomas.