David Maidment was the railway consultant for the fifth season of Thomas the Tank Engine and Friends. He also contributied to writing nine episodes for the same season. He was often the one who found the basis for many episodes in that season. When Britt Allcroft sold the rights to HiT Entertainment, Maidment offered to continue his position, but received no reply.
He is also the founder of Railway Children, whom his salary went to. As his work as railway director was a way of Gullane donating to the charity without directly giving them the money, due to them not wanting others to request donations.
All episodes were written co-written with Britt Allcroft and David Mitton.
- A Better View for Gordon
- Lady Hatt's Birthday Party
- James and the Trouble with Trees
- Gordon and the Gremlin
- Haunted Henry
- Double Teething Troubles
- Busy Going Backwards
- Duncan Gets Spooked