It is called the 'Brompton Builder.' I first saw this back in January at the Bike Show where I was competing in the Nocturne. Using it you can choose from the copious options available such as colour, gearing, seat, seat post height to name but a few. In addition to actually seeing what your ideal Brompton will look like, you also have details of its price and weight. All very clever.
If you head over to the Brompton website you can have a go and see all the different types of Orange Brompton you can buy! Well worth doing!