Roland: We know the client is a very green orientated company, very big on all things environmental. Saskia: Absolutely. Roland: So energy saving obviously needs to be an important consideration in the design. Clearly, it's a big subject, and something we need to look into in depth. But one specific aspect of it where think we can make a real difference is with the Building Management System specifically, with the way we use presence detectors. And I've had a couple of ideas that I'd appreciate your views on. Saskia: Sure, Roland: think we should put two totally different design options to the client. Option one is to have a building with maximum automation so with the maximum automation option