Infrastructure Bill [HL]

Before the noble Lord responds, perhaps I might come back on a couple of things. At what point in time did the Government move away from the carbon compliance standard that was agreed, and expected to be the consensus, and go to the level 4 alternative? There has been lots of paperwork flying around and, doubtless, we have missed it but can the Minister say exactly when that happened? What was the evidence base behind that, which led the Government to that conclusion? I accept that they may take a view on the imposition of costs, and so on, but it is really about the analysis that underpins that. As for allowable solutions, we are not opposed to them; they were reared as a concept under the previous Government, so we have no problem with that. However, I am trying to understand at what point and on the basis of what analysis that change was made.