I am not certain that I should try to answer that question, mainly because I do not know the answer, but I would have thought that they would go up in value as historic items.
My Lords, I wonder if I might return to the subject of the original Question. Will the noble Lord consider retaining one of our courtyards in an uncleaned state as a permanent reminder to all of us of the casual environmental damage we sometimes cause, which reveals itself only many years after we have caused it?
That is an interesting suggestion. I am old enough to remember the great London smogs that caused this damage to the building in the first place, and therefore on the face of it the noble Lord’s suggestion is a good one. However, I would resist it because of the damage being done to the building as of now, and therefore it is necessary to get on with cleaning and repairing it.