My Lords, we are pleased that the Minister has responded to our concerns and that the Bill now steers both local authorities and bus companies in the direction of less-polluting buses. That is very much to be welcomed, because we must bear in mind that technology is moving very swiftly. Electric buses are developing very fast. For example, I recently travelled on London’s first double-decker all-electric bus. There are biofuels—methane and so on. All sorts of opportunities are opening up very fast.
We must also bear in mind that this will become an Act that will probably last for decades—the previous one has lasted for more than 30 years—so we need to look to the future. It is essential that we make sure that new buses are non-polluting and encompass the best of technology at the time. Of course, as the noble Lord implies, there will be a cascading down of old buses but there are other ways in which local authorities and bus companies can manage to provide a less-polluting service. For local authorities, low-emission and ultra-low-emission zones must surely become more popular and common in the future.
I am sorry to disappoint the noble Lord that, as a devolutionary party, we on the Liberal Democrat Benches are also an environmental party. Therefore, there are times when we have to balance one principle against another and say that for the sake of the environment, which I remind noble Lords means for the sake of the health of our children as well as the natural world, we have to go with the best possible option. I believe that the Labour amendment has more detail because it refers to a very specific scheme so it is seriously worth supporting. We will not push our amendments to the vote but we will support the Labour Party on this occasion.