From article above:
"But the latest in a long line of explanations comes from aircraft enthusiast Mike Stradling, who claims 15-year-old Jonathan Burnett actually took a picture of supersonic Concorde and not a galactic space rock.
Mr Stradling, from Brackla, near Bridgend, said Concorde regularly flew over South Wales on its flight path to and from the United States. He said the flames and long smoke trail were from the jet's engines hitting full power."
Love it. No wonder the interior often smells of JetA1... Mr Stradling = aircraft enthusiast, I = The Pontiff! Has the man seen either the picture or the plane?