“Society needs chancers if it is to keep moving – and it must throw money at them from time to time”, according to Luke Johnson, chairman of private equity firm Risk Capital Partners, in his new self-help guide to entrepreneurship Start it Up.

The challenging and freewheeling life of an entrepreneur is the subject of Johnson's new book. Aimed at prospective small start-ups, the book covers the practical reasons for starting a business, alongside the philosophical and moral quandaries of running one.