I think that's a difficult question. It's difficult to find another example. Here we're dealing with a building built in the 1860s, bearing masonry that's undergone a number of renovations. It has a lot of asbestos in it. With the present policy, we're trying to bring it up to seismic regulations, seismic requirements.
The combination of all of this, together with the requirements for a parliamentary building, means it's very complex. The masonry is in extremely poor condition. We can't just put up standard scaffolding. For the north towers we've had to put up major structures in order to hold them up while we do the work.