Unit 2: Why did CPI inflation fall from 4.4% to 4%?

.....Ch4 reports http://www.channel4.com/news/inflation-falls-to-4-per-cent-in-march ....and the BBC http://www.bbc.co.uk/news/business-13053140 video http://www.bbc.co.uk/news/business-13045775 article....and anformehttp://www.anforme.co.uk/blog/?feed=rss2