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Includes sport and weather.
Channel 4 Dispatches: Harry Wallop examines the secrets of Aldi and Lidl's success, and asks if we can trust the big four supermarkets' offers as they fight back in a price war.
Jimmy Doherty explores how blood is becoming trendy in gastronomy, including blood meringues. Kate Quilton asks why Spanish melons are so juicy, and Matt Edwards finds out how rock is made.
The marine recruits must complete a tough series of physical challenges in the gym, including three staggeringly high rope climbs. If they fail, they'll have to leave their troop.