Britain is home to more than a thousand narrow-gauge railways, many created out of topographic necessity or for industrial purposes such as carrying coal, slate, clay and limestone. In his new book, Small Island by Little Train: A Narrow Gauge Adventure, train enthusiast Chris Arnot looks at the unusual and interesting history of these locomotives. Here’s a sneak peek of the spots highlighted in the book

Small Island by Little Train:
A Narrow Gauge Adventure
by Chris Arnot
(AA Publishing, £16.99)