Sir John Hayes

There is a big argument to be had about costs because we are planning a project that will last decades—perhaps even longer. When I was the Energy Minister, I was very conscious of the fact that we might be making 100-year decisions. It is very hard to gauge costs over time because of two things. First, there are the ongoing maintenance costs associated with any line that runs above ground, and given the changing climate, it is likely that extreme weather events will become more frequent, and extreme weather events will have an effect on anything above ground. Secondly, the relative costs of underground and overhead cables vary according to the kind of cable laid, as my hon. Friend the Member for Harwich and North Essex (Sir Bernard Jenkin) said; and indeed some of the evidence from other places in Europe and elsewhere suggests that the cost of trunking cables underground is falling, whereas there is no similar reduction in the cost of overhead cables, which, on pylons, have been at the same cost for a very long time indeed. The final point is about consent. The longer these things take, the more they cost. Certainly in Lincolnshire—and I imagine this is true in Essex, Suffolk and other places—there will be protracted legal challenges to the pylons, whereas, with local support and the support of local authorities like Lincolnshire county council, undergrounding would be a much more straightforward affair. Factoring in those costs is complex, but it needs to happen.