The Butterley Gangroad, which was engineered by Benjamin Outram, was modernised in the 1840s and turned into a narrow gauge railway.

BBC: Derby

But the engine is unable to travel by rail line itself as it can only run on a two foot wide narrow gauge.

BBC: The Princess in 1871

In London, the world's first narrow gauge steam engine, Princess, was unveiled after being restored by craftsmen on the Ffestiniog Railway, where she was used 150 years ago.

BBC: Wales

Even the gauge of the railway is controversial a narrow-gauge one to the south that would link seamlessly with China's network is the obvious option, and the one that people working on the project say is being adopted.

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One way to get to the famous stones was the narrow-gauge railway line that runs from Bushmills.

BBC: Giant's Causeway's long history of attracting tourists

The Talyllyn narrow-gauge line was built in the 19th century to carry slate from the Bryn Eglwys quarries near Abergynolwyn.

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In the Albula Valley the track spirals to gain height, and around the austere grandeur of the Bernina Pass becomes one of the world's steepest narrow-gauge railways.

BBC: Swiss movement

The facilities were serviced by a narrow-gauge railway.

BBC: Spurn Point 'not disappearing'