I don't think he realised that Sheila would take her life.
Sheila didn't take her own life, and albeit the first shot she received was downstairs in the kitchen when PS Woodcock entered, and there ensued a struggle over possession and control of a loaded weapon. Sheila was the female body described in the timed police radio message log as 'A Suicide' found downstairs in the kitchen. The only victim out of the five who perished whose death could be remotely described as a suicide was Sheila's, and who at the time was mistakenly reported as being dead at 7.37 and 7.38am had only been shot once, and in the circumstances at that stage was the only victim whose death could be explained away as a 'suicide' by virtue of the fact that once the firearm officers entered the farmhouse only a further two shots were fired. Now with only 23 shots having been fired, everyone else must have already been dead. For example, Neville Bamber had sustained four individual fatal shots, Daniel had five, Nicholas had three, which leaves only June and Sheila to be accounted for.. But why would police shoot June Bamber twice after they got into the farmhouse? Especially since, she was shot on all seven occasions upstairs in the main bedroom?
Sheila on the other hand, was shot once downstairs in the kitchen, and another time upstairs in the main bedroom.
One thing to bear in mind, is the fact that June Bamber was finished off as a result of being shot between the eyes. Now once that shot was received there would have been no need for anybody else to shoot her again. I conclude, therefore that June Bamber was already dead by the time the raid team entered the farmhouse and kitchen and she could not have been the dead female referred to as being found dead by way of suicide downstairs in the kitchen. The dead female mentioned in the timed police logs as being found downstairs in the kitchen could only have been Sheila Caffell (only shot once by that stage). Page contents have been altered in PS Woodcocks witness statement, and the retyped page contents of it start at the point where Woodcock starts to talk about entering the farmhouse kitchen..
Interestingly enough we know that although the police case against Jeremy Bamber related to a total of 25 bullet wounds existing on the bodies of victims collectively, and that only 25 bullets, or part bullets, were recovered from the victims bodies or at the scene, along with the recovery of only 25 spent bullet cases, that a total of 26 shots had been fired - yet, where is the 26th bullet?
Everything points to the missing 26th bullet having been left in the skull of Nicholas Caffell during autopsy, since although he was shot three times, only two bullets were officially recovered from his brain during autopsy..