Appears to be a spate of smoke in cockpit situations over the last few days. B777 diverting into Goose, B744 diverting into Vegas & an A320 returning to LHR today (another B744 diverted back to LHR yesterday for reasons I don't know)
Is it likely to be a "common" fault between the fleets, or are BA just having a run of bad luck? or for a fleet the size of BA is this the "norm" ?