Thank you very much for the opportunity to go back to the heritage aspect. I may not have completely answered Mr. Kerr's earlier question on this.
One complexity of the LTVP is that we have to juggle several driving factors, including new functional requirements, the security aspects, the heritage element, and the complexity of working on buildings that were built in times when the blueprints were not necessarily very accurate. You're right that we have run into discoveries that have forced us to rethink the approach for some work packages. Ezio will be able to give you a few examples of that.
Before I turn to Ezio, we adopted an innovative approach when we started to work specifically on the West Block, and that was by hiring a construction manager. That has allowed us to proceed with work packages concurrently. It has allowed us to make sure that the construction manager and the designer were working very closely, hand in hand, early on in the project. That has introduced flexibility in adapting to the realities of these buildings.
Regarding the heritage aspect and energy efficiencies, we work very closely with our internal heritage experts, the heritage conservation directorate. We also work with the federal heritage buildings review office. Their representatives review every design decision that is being made and the progress of the construction to make sure that we are not losing the heritage designation of the buildings in the parliamentary precinct. That does not preclude us from introducing efficiencies in the buildings, whether these be, for example, in water consumption, green roofs, more efficient windows, or more efficient HVAC systems. To the contrary, we are aiming at achieving the equivalent of a LEED silver certification for the buildings.
Ezio will give you some examples on the unexpected surprises.