Jonathan Freedland presents the series which finds the past behind the present.
4: Bad Cows and Englishmen. A nation at risk from the very stuff of life, diseased herds that no one would destroy, government intransigence in the face of mounting evidence. Some 800,000 people died from milk-borne tuberculosis between 1850 to 1960. Freedland asks if we are any the wiser a century on. Producer Mark Burman. Repeated at 9.30pm