He assisted for The Muppets in several of their UK appearances. Most recently, he puppeteered in the upcoming film, Muppets Most Wanted.
He also assisted Eric Jacobson with Miss Piggy and Fozzie Bear in a musical number on The X Factor and for PR and Publicity shoots. He also performed Animal, while Jacobson was performing Piggy, for an Olly Murs music video.
From 2001 through 2005, he worked with toy company Palisades as a "Muppet Consultant" on the figures, concentrating on the look and design of the characters. He also conceived the Invisible Fozzie Action Figure.
Warrick's original character Dodge T. Dog has performed on Comic Relief and Blue Peter (interviewing Selena Gomez in the latter), met the Queen, and went to The Muppets UK premiere to meet Kermit and Miss Piggy.