High Speed Rail (West Midlands–Crewe) Bill — House of Lords, 2020-11-30
Topic: Environment
Ralph Matthew Palmer (Conservative, Centre-right): My Lords, I am very lucky to be following my noble friend Lord Carrington because he said a great deal that I would have wished to say myself. A proper, healthy, temperate forest contains about 1,000 different tree species. That is true of North America and Asia. It is not true of Europe because the last ice age crushed the European flora against the Alps and we lost a lot of species and genera at that time. The ice ages also had a significant effect on us. At the peak of the last ice age we had only two trees species: pine and birch. Looking at things on a slightly longer than human timescale, those are the only two native British trees. Everything else has come in, but we still have only 31. It is a ridiculously small number and makes our forests extremely vulnerable to pests and diseases Pests and diseases travel easily. Even without our help, they blow in on the wind and come in on migratory birds. We have already experienced a number of these diseases. Round where I live in Eastbourne, most of the ash trees have gone. It looks as if as a continuing flow of disease is the future that we should expect. The right response to that is biodiversity. We should be striving for biodiversity in the number of species we are using in our new planting and in the origin of the seeds that we are using If we are careful and import seeds under proper conditions, the risks of bringing in disease are extremely low. I have seen the way Kew makes sure that what it brings in from around the world for its Millennium Seed Bank is safe to have and to store. It is not impossible and you do not need a huge weight of seed to supply a very large number of trees I very much favour what my noble friend Lord Carrington advocates. We should follow the direction that the Forestry Commission advocates and seek to increase our biodiversity—to get gradually towards a forest with more natural resilience and a more natural species than our current 31. That will give us resilience against incoming disease which we currently, quite clearly, do not have Where we face the regrettably small proportion of ancient natural woodlands, which are a great haven for established wildlife communities, we should not think that we cannot do anything to increase that. We need to plant the right kind of trees next door. It has always been the case that species move from one bit of wood to another. As I say, there were only two species here at the peak of the ice age. Everything else has come in. All the communities that live with them have come in. All these species are used to moving. If we create the right conditions next door, then in 100 or 200 years—the sort of timescale you are looking at if you plant trees—we will have a good community of woodland species in our new plantations We should not think that we can do nothing to increase our proportion of high-quality woodland. We should strive to increase it next to the woodland that we are damaging with HS2. To return to one of my noble friend Lord Blencathra’s earlier amendments, we should absolutely require that HS2 achieves biodiversity net gain.