How to waggle your wand - what makes a good conductor?

In the week Sir Simon Rattle's return to the UK with the London Symphony Orchestra was announced, we ask what makes him such a good conductor. #bbcbh

Taking us on an aural journey through the art of conducting, Clark Rundell of the @rncmvoice, Jonathon Heyward and Ray Chan of the @royalacadmusic and @tomservice. What makes Sir Simon so good?

(Image: Sir Simon Rattle leads the 100 piece 'Young Orchestra for London' at London's South Bank on February 15, 2015 in London, England. Photo by Dan Kitwood/Getty Images)