In a move that caught commentators by surprise, economy and industry minister Arnaud Montebourg signed a decree extending the state’s powers to prevent defence deals into an expanded list of strategic sectors, including energy.

The new law potentially has big implications for GE’s $17bn offer for the energy assets of Alstom – including its significant renewables interests.

Although Alstom’s board has backed the deal, Montebourg and French President Francois Hollande have opposed GE’s offer as it stands, citing fears over jobs and investment.

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