'Arry and Bert

'Arry and Bert (also known as Iron 'Arry and Iron Bert) are two diesel shunters who work at the smelters and scrapyards of the Sodor Ironworks. They can also be found working at the Ffarquhar Quarry.

Trivia

 * The two are not quite identical: Bert has more stubble.
 * Bert is the first character in the franchise to share his name with another character, and the second to do so in the television series.
 * In merchandising and the official website, the twins are named "Iron 'Arry" and "Iron Bert".
 * 'Arry and Bert's television series models do not have handrails, although some of their merchandise lines do.
 * The 1998 Official Website and Question Time with Sir Topham Hatt called 'Arry and Bert "The Yellow Diesels".
 * 'Arry and Bert's fifth season models were repainted and constructed into Splatter and Dodge for Thomas and the Magic Railroad.
 * One of the models might have been previously used from Diesel hence why he didn't appear in Season 5.
 * A model of 'Arry and one of Bert used to be on display in Canada at Nitrogen Studios.
 * 'Arry's name was not revealed until merchandising of him was released.
 * 'Arry and Bert have gone through a few changes in the television series:
 * Season 6:
 * Their side rods change from silver to black.
 * Their faces became smaller.
 * The text, "Sodor Ironworks", on their sides became bigger.
 * Their models were significantly less weathered than the previous season.
 * Season 3
 * Their faces become smaller still.
 * Season 14:
 * Their faces returned to the size they were in Season 5.
 * They gained new horn sounds.
 * Season 18:
 * They each gained a tail-lamp.
 * On 'Arry's trading card, he is depicted with more stubble than Bert, opposite of how they usually are.
 * There were a few occasions where they went faster than their basis' top speed.
 * 'Arry is the only character whose Mini does not have a classic variant, despite have a DC comics variant.