James Rebanks: Sustainable food in a growing world

In a special edition of the programme, HARDtalk is in the area known as the Lake District in north-west England. The landscape is beautiful, but is not wild. The fields have been shaped by generations of shepherds and stockmen. Stephen Sackur speaks to James Rebanks, whose farm has been in his family's hands for at least 600 years. In his book - English Pastoral - he advocates for a better kind of farming that is more sustainable and environmentally responsible. But are his ideas compatible with putting affordable food on all of our tables?