Sainsbury's pledges to double amount of British food sold by 2020, part of £billion '20 by 20 Sustainability Plan’ http://t.co/RrbGdC4W # "UK now farmed at rate of 5,263 beef sandwiches/hectare, compared to 2,439 bsp/h in 18th century": IGD chief economist http://t.co/z3Vv17rv #














