Sky's reporting is refreshingly unspeculative and includes the following:-
Inspector Paul Newstead, of Hampshire police, said he believed it was "highly unlikely" that crash was linked to the volcanic ash cloud drifting over Britain.
He said: "It will form part of the investigation but we do think it's highly unlikely, but we cannot rule anything out at this stage."
An AAIB spokesman added: "From what we know of the accident so far, there's no reason to connect it to the atmospheric conditions from the volcano."