Simon Nicholson was an episode writer for Thomas and Friends. He has also written for "Bob the Builder", "Rubbadubbers", "Tracy Beaker", "The Hoobs" and "Postman Pat". He also wrote a book for children, "The Oldmoor Orphans".
- A Bad Day for Harold the Helicopter (with David Mitton)
- Dunkin Duncan (story by; written by Jenny McDade)
- He, Gadi Levy, Marc Seal, Laura Beaumont, Dan Shatzberg, Paul Larson, Holger Potzern, Simona Pahl, Steven Elford, Rob Rackstraw, David Menkin, James Mason, Ross Hastings, Polly Churchill, Achim Schülke, Tobias Diakow, Marjolein Algera, Ernesto Lezama, Øyvind Borgemoen Lyse, Fabian Harloff, Dave Ingham, Nigel Chilvers, Lenora Hume, Lee Pressman, Sam Barlow, Miranda Larson, Stan Limburg, Jens Wendland, Helen Farrall, Lutz Harder, Francisco Colmenero, Steven Kynman, Sharon Miller, Rupert Degas, Lucy Montgomery, Knud Riepen, Eberhard Haar, Robert Kotulla, Ricardo Silva, Louise Kramskoy, Erik Schäffler, Douglas Welbat, Carlos Enrique Bonilla, Katja Brügger, Christian Rudolf, Jürgen Holdorf, Holger Mahlich, Robert Missler and Ian James Corlett have all worked on "Bob the Builder".
- He, Allan Plenderleith and Marc Seal all work on "PJ Masks".
- He, Albert Cohen, Marion Edwards, Ian McCue, Christopher Keenan, Erica Welch, Andrew Defty, Karen Davies, Thomas Holborow, Steven Kynman, Christopher Skala, Michelle Rodda, Jan Page, Lee Pressman, Helen Farrall, John Hasler, Ross Hastings, Laura Beaumont, Paul Larson, Miranda Larson, Karen Davidsen, Karen Barnes, Lenora Hume, Sam Barlow, Andrew Brenner, Dave Ingham, Jocelyn Stevenson, Sharon Quick, Pete Atkin, Fiona Hardwick, Lorna Withrington, Finn Poncin, Lizzie Ennever, Prokhor Chekhovskoy, Oliver Böttcher, Oliver Davis, Łukasz Talik, Samuel Harjanne, Nir Ron, Stan Limburg, Mia Kadosh, Petri Hanttu, Simona Pahl, Gadi Levy, Robert Hartshorne, Arlyn Bantog, Tim Bain, Benjamin Morik, Achim Schülke and Ole Jacobsen have all worked on "Fireman Sam".