Mr. Michael Nolan:

We have been engaged in fact-finding in other cities, including Madrid, Barcelona, Oporto and Copenhagen. We have been informing the process with the experience the developers of those networks have had. The notion of having an extensive network would be the subject of a policy decision outside our remit; we are delivering metro north. We have studied the methodologies used and the costs incurred. We will seek to exploit whatever advantage we can.