There is a certain value in doing what we would call horizon scanning to try to look at the potential alternative routes. I think the main value to that is in making sure that you don't preclude potential future options by your choices today, that by making choice A rather than choice B, you don't prevent yourself from making another good choice later on. This relates to some of what we have been doing, which we call “futureproofing”, in which we look at infrastructure assets, for example. We think about the different kinds of stress they might be under in the future and the different kinds of usage patterns they may have in the future, for example. Then we look at how futureproofed an asset needs to be against those changes and how futureproofed we think it is at the moment. Doing that can help you prioritize investments in the areas, if you like, that are weaker, against rising sea levels or increasing urban temperatures or changing demographics and usage and that sort of thing. So there is a role for it.
The nature of horizon scanning is always that it is best-guess work rather than concrete science. But if you don't do it, then it's very difficult to make informed decisions on it.