From Muppet Wiki

Phil Eason is a British puppeteer who puppeteered on Muppet Treasure Island. For Jim Henson's Creature Shop, he worked on The Bear, operated Blawp in Lost in Space, various animals in Animal Farm and Vogons in The Hitchhiker's Guide to the Galaxy.

Eason's other credits include Spitting Image (from Season 9 onwards) and performing Yaddle in 'The Phantom Menace.