Ulli is based on a BR Class 08 diesel-electric shunter. Over seventy members of this class survive today in preservation, while around 100 remain in service on the national rail network. They were in fact the most successful shunting engines in the world, with 996 of them built. Diesel, Rose, Paxton, Sidney, Splatter, Dodge, 'Arry, Bert and The Mainland Diesels are also members of this class.
Livery[]
Ulli is painted in a livery similar to the EWS orange-red and yellow livery. He has a black and yellow hazard stripes painted on his fronts, white ladders, yellow counterweights and red buffers.