There are a couple of really critical things. One is that there are insufficient stairs and elevators in the Centre Block. They will take up significant space.
If you look at an example of the West Block, the amount of space required for mechanical space increased fourteenfold as we moved from the previous building to this modern building. It takes a lot more space to operate the systems. We anticipate that there will be more bathrooms to service parliamentarians, so that takes more space, including the plumbing.