For our US operations prior to 2006/07, we were unable to separately identify emissions due to methane leakage from our gas distribution network from other apparent losses due to such things as metering and billing error. We therefore reported conservatively and included all as Scope 1 emissions. This resulted in overstatements of our emissions prior to 2006/07. We have now identified a methodology based on the EPA STAR calculation which separately identifies methane leakage and therefore have restated years 2004/05 and 2005/06 accordingly.

A comparison between these restated data and those used to calculate total greenhouse gas emissions previously reported in our  Annual Report and Accounts 2005/06 and on this website is given below.

We have clarified our definition of employee lost time injuries in order to align our approach to recording employee acute lost time injuries, chronic injuries and occupational ill health cases in the UK and the US. As a consequence, we are restating down the total employee lost time injuries for 2006/07 from 142 to 97 and the corresponding employee lost time injury frequency rate from 0.34 to 0.24.