The name may mean little but the investment revolution Damon Buffini leads has changed the lives of millions. Guy Adams on one of the UK’s most powerful and controversial businessmen. Damon Buffini is the most important person you’ve probably never heard of. Aged 43, he is the managing partner of Permira, Europe’s biggest private equity firm. He lives in Wandsworth, works in the City, and looks, to all the world, like a normal member of the pin-striped professional class.