Wilson's basis is EMD F-Unit which were used on American railroads and Brewster is based on BR Class 55. that's why I like to headcanon that due to their different backgrounds they would often argue about which accent is more correct, British or American. and then there's Koko, whose native language is not even English...
'it's wotah not waterrr'
'your wOtAh literally sounds like a gag reflex!!'
'are you even going to work already??' ahhh trainees











