Here’s a couple of photos of the Wessex in the drawing Lee supplied:

Wessex XM869 from Ark Royal arrives at RAF Changi, Singapore for the Battle-of-Britain display on 15th September 1963. The pilot is is Dick Boas and his co-pilot, not shown in the photo, is Dick Browne. The person looking directly at the camera is the Observer, Brian Routledge and the aircrewman with his back to the camera is believed to be Norman Anning.

David Taylor.