Using your angle theory, to try and explain how the barrel of the rifle appears to be resting against Sheila's neck, you would have to be lower down and closer to the body to displace the position of the end of the barrel higher up ( creating a sort of optical illusion if you like), but the lower you go down the bigger the gap between the body and the rifles barrel (which is not evident in photograph 27, but is shown in photograph 32) would show up. Similarly, your angle theory does not take into account the dramatic change in the shape and positioning of the bloodstain situated top right of Sheila's nightdress? Since, if you are going lower down so that you can create the impression that the end of the rifles barrel is higher up on the body, you would also be altering what you could see of the aforementioned bloodstain in 27. In my view, you would see slightly less of it, not more of it, and the characteristics of the actual stain would not alter to such an extent as it appears to have done when you compare 27 to 32? In your explanation you only rely upon angle, but I have already pointed put that the position and characteristics of the shadow along the full length of the guns barrel is consistent with the barrel resting against Sheila's neck / throat in 27, and it is consistent in 32 with the barrel not resting against her body where the end of the barrel rises up away from the body - you need to add to this the shape and position of the bloodstain on the upper nightdress...
Police moved gun its as simple as that, not only that but in one breath police say nobody touched or moved anything except Sheila's hand so that PC Bird could photograph a bloodstain on the front lower nightdress being worn by Sheila, but in the next breath DI "Ron" Cook is claiming he removed the rifle and placed it against the bedroom window where PC Bird took a photograph of it from the vantage point of the middle landing on the main stairs. So, depending upon which version of police events you choose to believe, they didn't move it, they moved it, and all this was taking place whilst PC Bird was taking his pictures of Sheila in the main bedroom. Still to be fathomed out, is who replaced the rifle which Cook had removed from Sheila's body and placed it against the bedroom window, who put it back on the body, to enable PS Woodcock to be able to remove it again from Sheila's body at 11;10am, to make it safe?
If Cook removed the rifle earlier, and put it against the bedroom window and Bird took a picture of the rifle there (23) from the vantage point of the middle landing, which Bird says was a photograph he took after his first session in the main bedroom, how could 27 and 32 have been taken before 23 with the rifle leaning against the bedroom window? So, if we take PC Birds trial testimony that he took photograph 23 (rifle leaning against window) before 27 and 32, it can only mean that somebody replaced the rifle atop Sheila's body in different positions as at 27 and 32, to try and show how Sheila could have shot herself (or not) with the rifle in the photographs?
Which came first do you think:-
Photograph 23?
photograph 27?
photograph 32?
If 23 was taken first, rifle was not on the body, until 27 and then 32...