Siri's UK voice answers questions about his journey to the iPhone 4S
 

The first rule of being Siri is do not talk about being Siri -- but Jon Briggs, the voice of the iPhone helper's British version, has, fittingly, has bucked that trend. Apple's preference for mystery surrounding the matter hasn't silenced the one-time tech journalist turned voice over actor who discovered that he was the voice of the 4S's assistant upon hearing his "flat and even" readings played back on a commercial for the handset. Briggs told The Telegraph that he recorded the basis for the British Siri five or six years ago, speaking some 5,000 sentences over the course of three weeks for "a decent sum."

http://www.engadget.com/2011/11/11/s...-to-the-iphon/