'Arry and Bert

'Arry and Bert (also known as Iron 'Arry and Iron Bert) are twin diesel shunters who work at the smelters and scrapyards of the Sodor Ironworks.

Bio
Iron 'Arry and his twin brother Iron Bert are diesel engines that work down in the scrap yards and smelters sheds. They believe that diesel engines are superior to steam engines, and they enjoy breaking down steam engines whenever they get a chance.