As many "sceptics" believe a physical reconstruction would have revealed the true timeline, then why not a timeline arrived at via forensic examination using software designed for this purpose?
You would need to factor in 6 statements from outside the group which suggest the alarm was raised before 10pm as well as the 6 from the group which said (on 4th) that it was 10pm.
In the next set of interviews 5 people gave a time for the alarm; 2 said 10pm, two said between 9.50 and 10pm and one said 10.03.
In the rogs 1 person said 10pm and 3 said between 9.45 and 10pm.
In the first interviews everyone agreed on the time. Later the time given became earlier.
If we look at the written timeline everyone was at the Tapas restaurant at 8.45pm. Then the Payne's arrival was changed to almost 9pm in the statements. This was not supported by the waiter or by Steve Carpenter, the only independent witnesses.
Some see the differences as normal. I see times being moved to later than they happened, including the time of the alarm..