SASB Code GRI Code Description Response, link or additional information Water IF-WU-140a.1 Water main replacement rate This year our water main replacement rate was 0.28% IF-WU-140a.2 IF-WU-420a.2 IF-WU-440.a.3 303-1 Water as a shared resources, including: Distribution network efficiency, End-use efficiency, and Water supply resilience Refer to “Ensuring a sustainable water cycle” section of the 2021 SR Additionally: IF-WU-420a.2 Leakage is one of our most important measures and we have seen our lowest ever levels of District Metered Area (‘DMA’) leakage. We report leakage as the volume of water we lose from the network each day as a three-year average. This year has seen us reduce leakage by 2.2% starting us on our journey to delivering a 15% reduction from our 2019/20 baseline over the next five years. IF-WU-420a.2 Excluding leakage and metering, we delivered demand-side (water efficiency) benefits of 1087700 m3. IF-WU-140b.2 303-2 Management of discharge-related impacts Refer to the “Ensuring a sustainable water cycle” section of the 2021 SR Additionally: IF-WU-140b.2 For further discussion regarding effluents of emerging concern, refer to section 1.4 of the “Creating bathing rivers” Green Recovery business case, available here: IF-WU-000.B IF-WU-440a.1 303-3 Water withdrawal IF-WU-000.B Distribution input = 72288615 m3 Total water sourced by source type: Impounding reservoir 25% Pumped storage reservoir 14% River abstractions 34% Groundwater works 27% IF-WU-440a.1 No water was sourced from high or extremely high baseline water stress regions as defined by the World Resources Institute’s (WRI) Water Risk Atlas tool Aqueduct available here IF-WU-140b.1 303-4 Water discharge, including effluent quality management Refer to table 7B and 7D of the 2021 APR Additionally: IF-WU-140b.1 Refer to the “Full dataset” section of the 2021 SR IF-WU-440a.2 Volume of recycled water delivered to customers 0% of our distribution input derived from water reuse schemes. SASB/GRI content index