Nic went off-duty and left the pub. She went away to the east of the village to go to her sick child in Greenwood Cottage.
Matt came back into the bar after she had gone, and talked with Kenton for a while; Kenton wouldn’t serve him, and sent him out for some fresh air.
Justin arrived breathing fire, Kenton talked him down, and Justin left some minutes later.
Matt was walking along the road with goes north-south through the village, nowhere even slightly near Greenwood Cottage, when he was knocked down.
Even allowing for the really extreme unlikeliness of Nic knocking someone down with her car, going over to check the body, and then leaving them to die in the ditch – particularly someone against whom she actually had no animus whatever apart from the invented one of not wanting to store his suitcases behind the bar that evening – and driving off with a squeal of tyres, why would Nic have been on that road at all?
And would the damage to her car have been unnoticed by Will? Not a snowball’s chance on a hot tin roof.