Christian Aid’s tax campaign in the UK sought to target the UK treasury.The relevant minister had a personal commitment to Christianity and to social justice. Christian Aid sent him a report on the links between the Christian faith and tax justice.The report resonated with the minister’s personal commitments and beliefs and he realised that his role in the treasury gave him the power to influence change. As a result of this, the minister engaged actively with UK non-governmental organisations (NGOs) on the issue and pushed for tax justice at the G20 London summit and at the Organisation for Economic Co-operation and Development (OECD).There is now a commitment from the G20 to work on supporting developing countries to benefit from tax information-sharing, and the OECD is working on country-by-country reporting.