Lightweight, compact, and now, electric: the cityscape has been forever changed by the addition of the Brompton bike, with its distinctive style and clever folding design. For over forty years, the Brompton's modular design has remained virtually unchanged. It has stood not only the test of time but every financial crash since 1976, Brexit, and COVID-19, not to mention every other risk which any business faces. Where, then, did this ingenious feat of engineering come from? Who were the minds behind it? And how did a small company grow to become one of the biggest cycling brand names in the world? This is not only the first look behind the scenes at Brompton Bicycle Ltd, but a masterclass in entrepreneurship, manufacturing, and scaling a business.