The PRA have made clear their expectation that climate change will be mainstreamed in insurance businesses’ risk frameworks. The first step in this journey is to measure exposure to climate changes’ many aspects and disclose them – even if only internally! In this talk we will outline the steps Aviva took in pulling together our first large-scale disclosures on the exposure of our business to climate change published in March 2019; in line with the recommendations of the Taskforce on Climate-related Financial Disclosures. After touching on why insurers have such an important role in climate change, we'll cover a brief “how-to” guide for those who have not yet embarked on thinking about these topics before giving a case study of how the learnings from a TCFD disclosure exercise can be applied to investment portfolios.