I refer to HMEssex's Post #201.
It is reassuring that he/she can make out a figure on the floor between the end of the settle and the doorway.
Now will you bear with me whilst I summarise how I theorise what happened at WHF after the arrival of the Initial reconnoitre of the EP TFG, summoned by Bews, after being sh.t scarred by the 'so-called 'trick of light' ?
Collins saw(by means of a mirror?) a female (Sheila?), through the laundry room window, located above the washing machine, and to the left of the backdoor as viewed from the yard.
It has become light as of this time. We know dawn on 7august 1985 occurred at approx 5.30a.m.
Having made known to Ch Super George Harris, their observations, Harris wants Jeremy out of earshot for the intended breaching of the doorway.
Thus Harris suggests to Jeremy that he may like call someone. N.B. he does not offer Jeremy the facilities of the police communications. Instead he gets him out of the way for the impending assault on the back door.
This was roughly at 6 O'clock. Unfortunately this went 'pear-shaped', when Woodcock clashed with Sheila in the doorway (hence we see the figure in the darkened doorway)
After this horrendous debacle, it is necessary for the Commander of the operation to reassess the situation.
They cannot re-enter the Farmhouse through the open doorway, because of Sheila laying there, and this situation being likely to be the subject of an investigation by CID.
Through the now open doorway someone notices a door opposite and it follows that it is decided to make the entry through that doorway, in order to obviate disturbing a crime scene.
To put this into effect, at approx 7.30 a.m.? it is once again necessary to get Jeremy out of earshot. This is surreptitiously achieved by the 'friendly' George Harris requesting Jeremy to show him the Opium field, some distance away(we know not where).
With the breaching of the other back door, the 'Raid Team are enabled to enter the premises, and then meet up with the problem of getting through the kitchen door, with Neville's body blocking it. Such is life and ..... !
I trust some of you may now see my reasoning for the lighting conditions of the enigmatic photo.