Crossing junction exactly as female JT described is a reasonable route from block 4 to creche. Their block 4 apartment had a kitchen therefore it is not necessary to assume eating out. IMO a reasonable explanation is she saw him walking towards creche, carrying the 2yo, to collect the 3yo. You can find evidence that only one of the two attended evening creche on a different evening tapas reservation sheet. The usual "witness stated direction wrong" analysis omits to even consider that there were 2 kids.
In any event, seeing as the Met could speak to both JT and the crecheman to unravel all this, one is entitled to presume the Met resolved that aspect of her evidence to everyone's satisfaction.