I do not want to prolong this, but I underline the point that what the noble Lord has said makes it very difficult for the huge economies that can be made in this scheme to be bought out. The petitioners cannot afford to present their technical evidence because it costs a lot of money, but if the committee were to take the initiative at least to take the advice of somebody, I am sure that we would come to quite different conclusions. HS2 has had a monopoly on the input; it is time that was tested.
Surely it is within the remit of the committee, if it wants to hear expert evidence, to call an expert in front of it to give it. As I understood it, if the committee wants guidance, it can call evidence, the evidence is heard and cross-examined and it becomes part of the evidence of the committee.
The committee will have to rely on the evidence from the petitioners.