Unit 2: UK inflation up to 4.4% in July

This BBC clip and associated article, explain the latest rise in the CPI

http://news.bbc.co.uk/1/hi/business/7556483.stm video
http://news.bbc.co.uk/1/hi/business/7555788.stm article

a) Why do fast rising food, utility and fuel prices (all over 10%) result in only a 4.4% rise in inflation?