This document discusses lessons learned from early carbon capture and storage (CCS) demonstration projects. It focuses on the key factors considered important for a successful business case, including regulated returns, viable storage solutions, large credible suppliers, long-term contracts, tax incentives, project clustering, and premium power prices. The document also examines funding requirements and proposed funding allocation for the Don Valley CCS project in the UK, which would require around £5 billion and utilize various grants, equity, debt from multilateral institutions, export credit agencies, and commercial lenders. Operating costs and revenue profiles are presented to illustrate the financial modeling for the Don Valley project.