Take away all the make up and lipstick, and what you are left with is photographic stil mage (a), with Sheila in the foreground, and the body of June Bamber in the background (dark version). The position of Junes body is laid in the general area where Sheila's body ends up by around 10 O'clock in time for PC Bird to photograph Sheila there, and Junes body against the other bedroom door...