UK Finance, working with members and the Association of Mortgage Intermediaries (AMI), the Building Societies Association (BSA) and the Intermediary Mortgage Lenders Association (IMLA) has developed a voluntary priniples-based framework for sharing customer vulernability information between mortgage intermediary firms and lenders. 

The principles are non-prescriptive and high level. They are intended as a broad framework that can help firms supporting customers to disclose thier needs and circumstances in a way which meets the FCA's expectations on "tell us once" and ensures that consumer duty outcomes for vulnerable customers are no different from any others.