British industrial narrow-gauge railways

British industrial narrow-gauge railways are narrow-gauge railways in the United Kingdom and the Isle of Man that were primarily built to serve one or more industries. Some offered passenger services for employees or workmen, but they did not run public passenger trains. They are categorized by the primary industry they served.

Power generation
Power stations were some of the last regular users of industrial steam locomotives in the United Kingdom, although most of these were standard gauge. However, several power generation facilities used narrow-gauge railways.

Contractor depots
Many construction contractors maintained depots that included narrow-gauge equipment in store and under repair. While some of these were temporary locations and often unrecorded, others were long term yards with extensive stock and facilities.

Tunnelling
Many narrow-gauge lines were employed for short-term tunnelling contracts. Most of these are unrecorded, so this list represents only a few of the many such lines.

City construction
During the garden city construction boom, several new towns and cities were built using narrow-gauge railways

Land reclamation and river maintenance
Temporary and semi-permanent narrow-gauge railways were often used during land reclamation schemes

Reservoir construction
Many reservoirs constructed before the Second World War employed narrow-gauge railways to move equipment and materials.