Partly because his budget is an unusual "ring-fenced" one, while other departments are being cut, the head of DfID - International Development Secretary Andrew Mitchell - constantly emphasises his quest for value for money, for both aid recipients and the British taxpayer.
The collection -- which numbers more than 100 pieces and is the largest the gallery has ever commissioned -- is displayed in several styles, including cinematic vignettes, life-size cut outs and straight head shots.