In this brand-new three-part series for ITV, adventurer Bear Grylls heads out on an epic journey of discovery across England, Scotland and Wales to experience the British Isles at their most spectacular. http://www.itv.com/presscentre/ep1week38/britains-biggest-adventures-bear-grylls http://www.itv.com/presscentre/ep2week39/britains-biggest-adventures-bear-grylls http://www.itv.com/presscentre/ep3week40/britains-biggest-adventures-bear-grylls

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