External verification of our CO2 reporting

From the very start of our Greenhouse Neutral Programme in 2003, we have disclosed our CO2 emissions, their principal sources and relative performance over time. Both for the programme’s first phase and its current second phase, we have calculated our emissions based on the guidelines of the Greenhouse Gas Protocol, the most widely-used emissions accounting standard (www.ghgprotocol.org).

Before our emission figures are published, PricewaterhouseCoopers checks them to verify our calculations. Their complete assurance report, which covers this and the four other main chapters, is included in the Independent assurance report.