'Arry and Bert are Iron twin diesels who work at the scrapyards and smelters of Sodor Ironworks. Their bodies are dark green with yellow hazard stripes.
Background[]
They feel superior to steam engines, and working at the scrap yards, they enjoy the chance to break up engines, or at least make their lives more difficult. They've earned a reputation on Sodor as "The Grim Messengers of Doom." Despite their prejudices, the diesels have co-operated with steam engines on occasion, and when they're in trouble, steam engines often come to the rescue.
'Arry and Bert are British Rail Class 08 diesel-electric shunters.