Simon Spencer (born 26 June 1959 in Clacton-on-Sea) was the producer and showrunner for Thomas & Friends from 2003 until 2008. He replaced Phil Fehrle when HiT Entertainment began producing the show. He also wrote six episodes for the show and served as a creative producer for The Birthday Express.
Thomas & Friends:Mavis's Engine Business Series #23 Episode #7
Mavis wants to go work at the quarry very badly, but she has to prove and she is responsible first. To do this, Mavis decides to start her own Engine Business, which includes watching over the strong narrow Guage Engine, Skarloey, who is very good and really useful.