John Hartshorn

John Hartshorn, also known as John Stewart, was a well known and well respected sound supervisor at the British Broadcasting Corporation.

His credits included Blue Peter, Jackanory, Top of the Pops, Doctor Who, Wogan, The Lion, the Witch and the Wardrobe, The Duchess of Duke Street, In Sickness and In Health, Till Death Us Do Part, Juliet Bravo and Hancock. 

_{Biography from the Wikipedia article, licensed under CC-BY-SA}