In addition, we identified potentially material issues by assessing topics from relevant sustainability frameworks such as the GRI and Sustainability Accounting Standards Board (‘SASB’), sustainability megatrends as identified by the UN Sustainable Development Goals, Severn Trent’s Sustainability Framework and priorities, and through direction by our external 	2Scoring for likelihood and impactGuided by the GRI’s approach to prioritising impacts based on severity and likelihood, we scored each sub-topic on two scales: the likelihood of a positive or negative impact, and the scale of that impact.