He's designed everything from cutlery to cars, chaise longues to space ships - he's the brains behind one of the most iconic pieces of furniture of the late twentieth century - the Lockheed Lounge - and that's just for starters. Acclaimed industrial designer Marc Newson relishes the extraordinary diversity of his portfolio, and as he tells Alan Yentob, any designer who cant set their mind to such a huge range of things might not be much of a designer at all.