sleuthingforjustice.com is the place to have a read. On that forum, Mike Tesko speculates the following
"Let me put things into perspective, by drawing the viewers attention to the fact, that between 8:15am, and 8:30am, DCI Harris spoke to ACC Peter Simpson, on the telephone, from the kitchen at whf, DCI Harris was updating ACC Simpson, as to the latest developments which were and had been occurring inside the farmhouse, and that photograph number 14 (69/15) appears to have been taken, or could have been taken at about 8:25am, or in other words, the picture numbered 14 (69/15) may have been taken during or after or whilst DCI Harris was or had been updating ACC Simpson, and in those circumstances, photograph 6A, which shows the blood fresh and wet looking to be running and leaking from the two wounds upon Sheila's throat/neck, had already been taken upstairs in the bedroom (by that stage)...
Details of the conversation between DCI Harris, and ACC Peter Simpson, have not yet been disclosed, and probably will never be disclosed, because it is anticipated that what DCI Harris spoke to ACC Simpson about, at that time, was the fact that Sheila's body had originally been found downstairs in the region of the kitchen (presumed to be dead), but that she had regained consciousness, and fled upstairs where she was shot for a second time, her body now being inside the main bedroom, upstairs"