My Lords, I declare my interests as on the register. I want to comment briefly on two amendments. First, I welcome my noble friend’s Amendment 89; it is important to keep under review the amount of land available for the net gain register.
Secondly, I want to comment on Amendment 84A from the noble Lord, Lord Krebs. I say this to him: I do not think it is necessary. As he said, this is evolving. The metric as published by Natural England is not set in stone. It will be an evolving measure, and as further and better particulars come along, it will be changed and amended. An annual review by the Government is not needed for that to happen.
The other point I want to make is this: yes, of course, the metric could be made more complicated. Some on the Climate Change Committee condemn it, because it is just a biodiversity net gain metric. They want an environmental net gain metric, which would be an all-singing, all-dancing super one, but incredibly complicated to produce. No one is capable of doing it properly at the moment.
If we bring in lots of other factors, which would no doubt make this much better in biodiversity terms, we would be faced with an industry and builders that have not a clue how it would work. Net gain is terribly, terribly important. It will be one of the greatest improvements to planning and the environment we have ever seen in this country. But it is a completely new concept; it is innovative. For it to happen, we have to get developers on side, working with it. At the moment, they have not a clue how it works. They have a couple of years, I think, to get that right.
I am concerned that we keep this initially simple. The current metric, which is still doing a good job and can evolve and can change, will not be detrimental to biodiversity; it will be a big improvement to biodiversity. But I am certain that in a couple of years’ time or a year’s time, it may be tweaked again to improve it. As developers and Government and Natural England bed this down, I am certain it will become more sophisticated and more perfect from a purist environmental point of view.
So I say to the noble Lord, Lord Krebs, who is incredibly able and thoroughly knowledgeable in this matter—he is 10 times more knowledgeable than I am, though I am practical—that we have to start somewhere. There used to be an army acronym KISS: “Keep it simple, stupid.” We have to keep it simple to begin with, and we can make it a lot more complicated as we get used to it.