How do you see the UltraFan evolving over the next few years, given that there's no clear airframer launching a new platform?

As an aside, on the UltraFan program, that was the whole ethos around the UltraFan demonstrator program. It was very much a case of not only developing a new engine type but also taking the opportunity to start de-risking ahead of programming need. Partly because that protects your customers against disruption, and also partly because, frankly, it's cheaper. You can take those risks out in a smaller program, in a more agile program where you don't need to meet all the certification challenges as part of that technology proving program, so it's easier to do.