Scotland's rail network crosses a landscape voted the best in the world. This series follows the staff and enthusiasts safeguarding these iconic routes.

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Two hundred lucky passengers board steam locomotive, Union of South Africa. There's a charity abseil from the Forth Bridge. A team of engineers scramble to erect the UK's largest landslide barrier.
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Two hundred lucky passengers board steam locomotive, Union of South Africa. There's a charity abseil from the Forth Bridge. A team of engineers scramble to erect the UK's largest landslide barrier.