Welcome to Muppet Wiki!
John Thirtle working on Spitting Image.
John Thirtle (1948-1995) was a British puppeteer, who, along with Ian Allen, formed Playboard Puppets, and created the series Button Moon and The Spooks of Bottle Bay.
He served as an additional puppeteer on Dark Crystal, The Muppet Christmas Carol, and Muppet Treasure Island.