I’ve been going on about how companies are now able to create a digital prototype which can modelled on a computer screen and tested with increasingly powerful simulation software. As an example, a new car can be viewed in a virtual-reality environment and also test driven on a simulator on any sort of road in any country or climate long before a wheel touches the ground. Now I have another example. Helmuth Ludwig, chief executive of Siemens Industry USA, has been telling how his firm’s software was used in the design, production planning and testing of the Mars Rover. Getting that to the Red Planet in one piece really was a challenge. So maybe you could test drive a McLaren 12c there too.