Mark Mander was an additional UK Muppet performer on Muppets Most Wanted (where he played a baby), having previously served as an additional puppeteer for the second season of Mopatop's Shop. He also worked as an additional puppeteer on The Dark Crystal: Age of Resistance.
Mander's other puppetry credits include The Roly Mo Show and operating hippo George (from long-running children's series Rainbow) in various guest appearances.