So from memory, FM has stated that they were inside making the cups of tea when they became aware that they couldn't hear him - however after listening to the 000 call, which she made while she was outside looking for him, she responds to the question of "there wasn't anyone suspicious in the area or any suspicious vehicles in the area?' .... FM replies "No, no, no, well no, not that I'm aware of, we were just, I was out there talking with Mum and my other daughter, so, and we heard him roaring around the garden, then I thought I haven't heard him I better go and check on him and I can't find him".
What is she referring to when she says 'out there' remembering that she is on the street while she makes this call?
Initially the news reported FM as having gone inside to make tea and it was while she was making tea that William snuck around the side of the house and disappeared. Since then, FM has said she made tea and then sat on the deck with FGM and the sister and then realised she couldn't hear him. (How he was playing a game with the sister at the same time the sister was with FM and FGM per 000 call is unclear).
I believe originally she was saying he was out of sight for 3 minutes (which is kind of like the maximum a parent would want to admit to i think), but later amended what she did in that time, which makes it longer than she originally stated (made tea and sat down for at least a moment before realising she couldn't hear him anymore).