Sure. I would say there are a couple of elements. I'll deal first with the visitor welcome centre and the excavation work. The approach we're taking with that is essentially what I would call a “no regrets” approach. We've tendered it in a way so that it is scalable. The goal over the next several months would be to be able to make those decisions to align with the excavation. The excavation will take a significant amount of time. We've tendered that in a way that it'll align as well as possible with decision-making and that there will be no delays.
Decision-making, obviously, is critical. Resilient decision-making is fundamental, as is the agility of the decision-making. This level of engagement should hopefully get us to a point where there are no later changes. We get resilient decisions and that is really critical to these types of projects. Changes are what have a significant impact. The work we've done on the assessment program for de-risking unknowns and working through this engagement to ensure there is consensus around where we're going is a solid approach to ensuring that we're able to move forward. Over the past decade plus, in partnership with parliamentary partners, we have integrated a host of lessons learned and developed capacity and competencies to be able to complete this work, and have demonstrated a track record of being able to deliver these projects on time and on budget. We have, from a management perspective of the project, a fairly well-oiled machine to be able to implement this. It's really going through this engagement process to get to decisions that Parliament will be comfortable with today, in 10 years and 100 years from now.