Perhaps we now we know why the stock priced move as it did? With the announcement of the deal with FlyBe, then Mainline may expect to benefit and so it would be good to buy early.
That fact that the sell off will return BA to the BOAC / BEA set up is very amusing to those of us that have been predicting this. And it would be interesting to hear the reasons why the board changed their mind after saying many times that there would be no LH/SH split.