York Festival of ideas running during a good part of June has several talks on food production ,security and distribution and sale.
Two programmes I listen to regularly are the Farming Programme
http://www.bbc.co.uk/programmes/b006qj8q- on at the rather early hour of 5.40am , but you can podcast or listen again,
and the Food Programme,
on at 12.30pm on Sundays. Both programmes have a lot of good information about food production, sustainability, small producers and retailers.