So what do we know? Or what information do we have about the night of the fire? Unreliable or not.
We know..
Early evening , when it was light.
Family go home after a good day out.
Tom says..(potentially lying)..
That Kate takes the kids straight up as they were tired, no bath.
And he went 15 minutes later.
Later on..(when its dark)
Emily (?) seen by Dylan running through the woods followed by Kate. Lies that it was Tom. (why?)
Later on...(middle of the night?)
Jess gets up with child and sees the fire.
Kate found first on the floor (which room?) and brought out but dead.
Tom saved second, on bed fully dressed and survived.
Kids locked in bedroom with a lock on the outside (seemingly bought/stolen by Kate) didn't survive. Had injection marks in arms.
Fire started in kitchen.
Hmmm... interesting mes amies. *twirls Poirot style moustache