Per the Financial Times:
Government officials in London, Paris and Berlin blamed each other for not backing the €36bn tie-up between BAE Systems, the UK’s defence champion, and EADS, Europe’s biggest civil aerospace group, while investors accused BAE of having a muddled strategy that threatened shareholder value.An opinion piece in the Economist blames it on Germany (EADS ownership is complex; a large portion is controlled by Daimler). And, the BBC has a very nice summary of the whole deal.