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(dramatic music) So, potentially over 500 of these constructions across Britain, and they would've been mainly built by the Royal Engineers, to begin with
Full Transcript
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(dramatic music)
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So, potentially over 500
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of these constructions across Britain,
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and they would've been mainly built
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by the Royal Engineers, to begin with.
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Movie Summary
During World War II, the British built or reinforced a series of structures consisting of over 26,000 buildings to form a line of defence against an expected German invasion. Rob Bell travels around the UK to learn their secrets.