The need for food banks is most severe in the post industrial north of Britain. Five years of austerity measures 2009-2013 have left their mark, as have rising prices and stagnant wages. Average hourly earnings are up 7% in that period while the cost of living is up 20%. About 500,000 people are dependent on food aid, triple the number in 2012, according to the Trussell Trust, a Christian charity. A conservative MP says 1 in 5 children go to bed hungry in his constituency of Wycombe. In Hull, one in three children live under the poverty line. Food charities doing most of their work in Africa, now concentrate efforts in the north of Britain.