The following tables contain group level results

Delivery efficiency was restated in 2021 and therefore may not be comparable to previous years’ Sustainability Reports. . Please see Annex 'Restatement', for more details. (Table subject to PwC limited assurance assignment)


Air Quality and Sustainable Procurement 2019 scores were restated in 2021.  Please see Annex for more information on restatements, indicator definitions, details on reporting participants, and the PwC assurance report.