I thank the noble Lord, Lord Borwick, as I said, and the noble Baroness, for coming round with me and coming up with these ideas. I have seen the exchange of emails that the noble Lord has had with the principal electrical engineer. I do not want to raise hopes too high at this stage, but while there is no doubt that the ducts in their current state could not be used, I can tell the noble Lord that the complete survey that we are carrying out now will be presented to the Services Committee as a possible option, depending on the results. That is down to his efforts. I pay tribute to him, as a former member of the Services Committee, as hugely hard-working and diligent, and for the refreshing ideas that he and the noble Baroness, Lady Kramer, have managed to give to this whole enterprise.