Aardman Animations
From Tardis Wiki, the free Doctor Who reference
Aardman Animations were the studio who produced the games Doctor Who Game Maker and Don't Blink.
They are well known for their claymation productions, most famously Wallace and Gromit, Shaun the Sheep, and Creature Comforts.
One episode of Shaun the Sheep, entitled Party Animals, had one of the sheep dress up as a Dalek for the Farmer's birthday party. The Farmer is briefly scared by his entrance, and the Dalek-sheep has trouble getting up the stairs.