The UK Office for National Statistics published an interactive visualisation tool (charts, tables, etc.) that lets you analyse your personal spending habits with regard to the Retail Price Index ("inflation"). The application works with the Adobe SVG viewer in Internet Explorer, in Opera9 and Firefox 1.5 or higher.

The application can be found at http://www.statistics.gov.uk/PIC/index.html and additional information can be found at the project page.