My Lords, I am not quite sure whether I can help the noble Baroness. I asked the same question about a mined tunnel in Committee and the noble Viscount, Lord Astor, explained it all to me. The problem is that I have forgotten the explanation. It sounded very plausible at the time. I am sure if the noble Baroness consults her noble friend she will get all the details of what should be done.
I listened to the noble Baroness who spoke earlier from the Conservative Benches. She made a fleeting appearance in Committee and said pretty much the same thing; I hope she will forgive me for saying so. I do not think emotive language about a two-track railway destroying the countryside takes this House or this debate any further forward. What did she say: “Just another 8.7 kilometres of tunnel”? That is in addition to the 47 kilometres of tunnel out of the 210 kilometres of the high-speed railway line. This is expensive lunacy in my view. I make a plea again on behalf of those who travel by train. People do not travel by train to gaze at a tunnel wall. Some of the semi-hysterical comments—I exempt my noble friend Lord Stevenson, he will be relieved to know—about
the damage that the railway line will do to the Chilterns are just that, sheer hysteria. They were all made 30 years ago at the time of High Speed 1 across Kent, and none of it proved true then. Indeed, the economy of Kent has benefited enormously from High Speed 1.
The secondary point—the great unmentionable in this debate on the demand for tunnels—is of course that some people making these points about additional tunnelling do so on the grounds that there is no benefit from high-speed rail passing through the Chilterns to those who live there because there are not any stations. Well, there may be at some time in the future, as we have heard. Again, I exempt my noble friend from that; he is my Whip and I had better tread carefully. Once you get out of London, the M40 passes through the Chilterns without a mile of tunnel. Has that motorway destroyed that part of the world? I do not think it has. My noble friend nods his head but I do not think most people agree. Mind you, of course many of them use the M40 and that they are not going to be able to use the train is behind a great deal of the opposition, in my view. I hope that the Minister resists temptation. Whether it is cheaper to build a mined tunnel or go ahead with the existing proposals, as the Select Committee recommended, I know not. Nobody could have worked harder than the committee to look at those objections. I think there is quite sufficient tunnelling already so far as this high-speed railway is concerned, much of it expensive and unnecessary.