Tim Dunn is a British railway historian, TV presenter, geographer and travel editor. His presenting work includes Trainspotting Live, Britain's Greatest Invention, Trains that Changed the World, Secrets of the Railways, The Architecture the Railways Built and Secrets of the London Underground.

In addition to broadcasting, he has curated museum exhibitions, been a museum trustee, and is on the advisory panel of the UK's Railway Heritage Trust. He is a contributor on railways and architecture to a number of publications such as RAIL, The Railway Magazine and Londonist. His book Model Villages was published in 2017.

Tim Dunn