Other credits include appearances in ''
Blake's 7'' (in the season A episode "Mission to Destiny" and the season B episode "Gambit"). Also, notably in children's programmes, ITV's
Rainbow from 1972 as the original
Bungle, and the BBC's
Jigsaw in which he voiced Jigg, the show's "mascot" and played the giant Biggum, who was so tall only his feet were seen and his voice heard. He was one of the resident team of actors in stunts for ITV's
Game for a Laugh (1981–85), appearing in one memorable stunt involving a car transporter wrecking his car and blaming it on the unsuspecting victim. His film credits are few but included the Hunt Secretary in the film of
Tarka the Otter (1979), and a TV interviewer in the film version of
Whoops Apocalypse (1986). His radio work includes the comedy serial
All That Jazz (1990) in which he played the character of Mike and additionally provided the scripted continuity link at the beginning. Leeson has read extensively for the audio book charity Calibre Audio Library, and is also the narrator/character voices behind
The Space Gypsy Adventures on Children's UK
hospital radio. In 2010 John appeared in a character role in the
independent film Rebels Without A Clue with actor
Rik Barnett. Away from stage and screen he was regularly heard as
continuity announcer on
Channel 4 when his warm tones proved a distinct contrast to the K9 voice. A lively interest in both classical music and particularly wine, led him to develop a longstanding parallel career as a wine educator. Under his birth name he is an accredited tutor for the
Wine & Spirit Education Trust, and he is a member both of the Association of Wine Educators and the Circle of Wine Writers. He is a freelance lecturer in wine both on land and in cruises at sea, and is a regular tutor for The Wine Education Service Ltd. ==Literature==