Exclusive: Mystery over tycoon's air death

Exclusive: Mystery over tycoon's air death - An air collide that killed one of the world's richest men is likely to stay a mystery after an official report could not say how it happened.

Investigators say they have reached "no definite conclusion" as to why the light aircraft went down, transport French billionaire Paul Louis Halley.

Mr Halley, 69, his wife and the Belgian pilot died near Oxford's airport.

The Air Accidents Investigation Branch establish no technical fault but did not rule out pilot error in the 2003 crash.

Investigators said it was likely the pilot, Hans Frans Walter Brams, 46, "might have been distracted by a bird" as he tried to land the Socata TBM 700 aircraft on 6 December.

Mr Halley co-founded the retailer Promodes which merged with the French supermarket giant Carrefour in 1999.