Mr. Ciarán O'Connor:

On the heritage side, there are certain buildings we cannot change. Where that choice would come in, for instance, in a place like Castletown, we would also examine what other things we can improve, energy usage and the systems to control that, better environmental issues. On a project we have mentioned, the forensic science building, there are 25 air changes an hour in that building with huge air loss but we will regain most of that heat. As a subset of that when we were doing the foundation work for that building we were using it as part of the defence and security element to defend the building from intruders but it is part of the landscape. That has saved us bringing any soil offsite to put into landfill. We would take those wider issues on board as part of that broad spectrum of approach. We have a core and a comprehensive approach. The core is the minimal element, the lighting and energy, and the comprehensive would be the further, deep retrofit.