My Lords, I support the amendment and my noble friend. The arguments she made during the Energy Bill have come to pass—I do not think that Bill lasted for four years, as the noble Lord, Lord Teverson, said, but it felt like it. The reality is that while in America the arrival of shale gas has driven out coal, to the benefit of carbon emissions—this links back to previous debates—it has also had the knock-on effect that the world price of coal has gone down. Therefore, the economics of coal in the rest of the world now look much more attractive. The economics of continuing to run coal-fired stations look dramatically more attractive.
A number of things were not clear during the debate on the Energy Bill and when it passed, including the exact way in which the capacity mechanism would work and who would be eligible. Some of that has become clearer with the regulations that have gone through. We now know which plants are being put in as a capacity mechanism; it includes some pretty old coal plants. Plants that companies such as EDF gave a clear indication, seven or eight years ago, would close about two or three years from now are now being rolled forward. The way to square that would have been for the performance standard to apply to old coal as it does to new coal plants, but it does not.
While the noble Lord, Lord Jenkin, is right that we encourage all plants to fit this abatement of sulphur et cetera, we have not applied the new emission standard in the Energy Act to all this old coal plant. As I understand it, the purport of the amendment is to ensure that they will be treated in the same way as new plants. That would change the economics of coal.
The other thing that has changed since the debate on the Energy Bill is that it was assumed at that time by some of the modellers that, as was originally intended, there would be a ratcheting up of the carbon price floor. That would also have altered the relative price of keeping on old coal, to the detriment of the coal industry. Of course, within a few weeks of the Energy Bill receiving Royal Assent, the Chancellor announced that we are no longer going to ratchet up the carbon price floor. Leaving aside the principled arguments about the use of a carbon price floor, the effect of that is that the economics do not look the same as they did when we were discussing that Bill. Clearly they were expressed as looking that way by the Government. As the noble Lord, Lord Teverson, said, it could mean that old coal plant could be running for decades as a result of the emissions performance standards not fully applying and the abolition of the carbon floor price ratcheting up.
The amendment is intended to ensure that that is not the case. As the noble Lord, Lord Teverson, has said, the immediate effect is to make our energy supply more dependent on old coal and less attractive to investment in new gas. Therefore, the higher the level of old coal that qualifies under the capacity mechanism, the less investment there will be in new, efficient gas generation.
In all terms, the economics have been made more difficult. The environmental cost of carbon emissions could be substantial. I therefore hope that the Government at least understand part of that argument and recognise that they have to do something along the lines my noble friend is arguing in support of these amendments.
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