7:45 is not the official time of entry, the information log states 7:34-7:36 and Wests log states 7:40, which is consistent with the delay between the information room passing that information to West.
There are three paragraphs in the 2002 Appeal Judgement which talk about the time of entry, paragraphs 8, 32 and 239.
8. When the police attended at the farm, they were joined by the appellant. There was no sound from the farm save for the barking of a dog and fearing that they might be in a hostage situation the police decided to wait until daylight. At about 7.45 a.m., armed officers entered the farm and found all 5 occupants dead from gunshot wounds. Mr. Bamber lay dead in the kitchen, his wife was dead on the floor in her bedroom, the boys were dead in their bed and Sheila Caffell was lying on the floor of the same room as her mother. Across her chest and pointing up at her neck, through which the wounds that had killed her had been fired, was the rifle used to shoot all five members of the family. Beside her body lay a Bible. The scene certainly gave the appearance that Sheila Caffell had shot herself, and the likelihood that this was the case was reinforced by information given to the police by the appellant.32. Reconnaissance of the farmhouse revealed all the doors to be shut, as were the windows save for one in the main bedroom on the first floor. At about 7.30 a.m., the decision was made to enter the farmhouse and not long afterwards officers moved into place. Through the kitchen window, an officer observed the body of what appeared to be a woman but was in fact Mr. Bamber. Entry was then forced through the rear door which had been locked from the inside.
239. We have considered with great care the statements of PC Collins and PC Delgado who must have been the two officers who entered first at about 7.30 a.m. on the 7 August. PC Collins in a statement of the same date describes forcing an entry into the house and seeing the body of a male person positioned over an upturned chair, which balanced against a cupboard. Having described that person and concluding that he was dead he said:"On looking around the kitchen I saw upturned chairs and stools and broken crockery on the floor, and on the floor on the far side of the room there were small spots of what appeared to be blood. It appeared that a violent struggle had taken place within this room".PC Delgado made a similar statement.The full Judgement can be viewed here:
http://www.bailii.org/ew/cases/EWCA/Crim/2002/2912.htmlAs you can see, you have picked on paragraph 8 which gives an "about" time of entry
and discovery of bodies, and that is entirely consistent with the logs.
Paragraph 32 is also consistent with the logs giving a time of "about" 7:30 that the decision was made to enter.
And paragraph 239 is referencing the statements of the firearms team members and is also consistent give or take a few minutes.
What is inconsistent with the other documents is that Harris arrived at 7:39 and he says the firearms team were preparing to enter the premises, because at that time the search would have commenced a few minutes before.
But we are talking about a few minutes, not 15, and whilst you may declare all of this as evidence of lying and manipulation of evidence, quite frankly, I don't.