1. Mountains

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. 4 March 2013. 60 min

Explores Britain's most extreme winter landscapes. Ellie Harrison looks at British mountains as she reveals the surprises this terrain holds, from avalanches to reindeer.

2. Lakes

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. 5 March 2013. 60 min

Explores Britain's most extreme winter landscapes. Ellie Harrison is in the Lake District, finding out about an extremely rare Arctic winter resident.

3. Forests

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. 6 March 2013. 60 min

Explores Britain's most extreme winter landscapes. Ellie Harrison visits Britain's forests during the winter months, looking at charcoal creation and tree planting.

4. Estuaries

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. 7 March 2013. 60 min

In a series exploring Britain's most extreme winter landscapes, Ellie Harrison is in the UK's largest estuarine habitat in Morecambe Bay, Cumbria.

5. Islands

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. 8 March 2013. 60 min

Series exploring Britain's most extreme winter landscapes. Ellie Harrison visits the Shetland Islands to learn about island life during Britain's most challenging season.