Ms Mary Considine:

We will do everything we can to avoid disruption to our customers but the reality is when you are still operating a live railway today and building out new capacity for tomorrow's railway, we cannot guarantee there will not be disruption. There will be essential works to the infrastructure and we are already testing the new fleet. It is a combination of all of those and, obviously, we always have to put safety at the very core of everything we do and make sure it is paramount. I cannot guarantee that there will not be disruption.