Suppose the British government knew that a key shareholder in Centrica, our last great British energy company and owner of British Gas, was to sell its stake to Gazprom, so making Russian state ownership inevitable. I hope that, in this scenario, the government would expand the provision of the Enterprise Act that allows Britain to block takeovers that are against the national interest to include gas and nuclear power. (The act is currently confined to defence, financial services and the media.) I'm pretty certain that Centrica chairman Sir Roger Carr, also president of the CBI, shares the same view. No country can be indifferent to the ownership of strategic assets and thus the use to which they might be put. Its first obligation is to the well-being of its citizens.