More likely incompetence, I think, but more sinister possibilities must of course be investigated.
Environment Secretary Hilary Benn said a result of the investigation of the Pirbright labs is expected within 48 hours. The Merial site will be examined first because it has used the virus more extensively over the past month.
However, Prof Neil Ferguson, an expert from Imperial College London, cautioned that the source of the outbreak may never be uncovered.