1. Scottish Highlands, Cumbria, Pembrokeshire & Cornwall

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. 1 May 2016. 47 min

Paul begins his tour in the Scottish Highlands and Cumbria, before heading to Pembrokeshire and a wishing well in Cornwall. There's also salmon farming, low-level nuclear waste and fell running.

2. Beasdale, Bristol & Pontarddulais

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. 8 May 2016. 47 min

Paul Merton visits more of Britain's railway request stops, including Beasdale, where the Special Operations Executive taught espionage in World War Two. And Pontarddulais - a Welsh wedding town.

3. Pembrokeshire, Manchester & Corrour

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. 15 May 2016. 47 min

Paul visits a training camp from World War I on the Pembrokeshire coast. There's a Manchester stop with only one train a week and the remote stop of Corrour on the West Highland Line.