He said he thought " he didn't think it would make a difference in how long police would take to turn up " and " he didn't know how the system worked "
He was impatient when he was on hold with PC West. When West returned to the call JB angrily said " Jesus's christ, you took ages"
For me, I don't understand from the his perspective why he didn't phone 999. It's not incriminating in him doing so and either way WHF was going to be a major crime scene swarmed by police at some point.