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Never-before-seen images of 'Birdsong' tunnels dug by British pit workers to undermine the German lines in First World War | Daily Mail Online
![TIL that during WW1, explosions in France were heard in London. A team of miners worked in secret to dig tunnels under the German trenches during the war in order to plant TIL that during WW1, explosions in France were heard in London. A team of miners worked in secret to dig tunnels under the German trenches during the war in order to plant](http://www.wwi-models.org/Photos/Events/y2006/ipms_nats/07-figures/IMG_5405.jpg)
TIL that during WW1, explosions in France were heard in London. A team of miners worked in secret to dig tunnels under the German trenches during the war in order to plant
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The War Below review – plucky shot at telling amazing story of wartime tunnellers | Movies | The Guardian
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