This document has been prepared by CORE, with contributions from Amnesty International UK, Anti-Slavery International, CAFOD, Focus on Labour Exploitation (FLEX), Know the Chain, Quakers in Britain, ShareAction, Traidcraft and Unicef UK, and is supported by ECPAT UK, Walk Free and Unseen. The guidance is intended to share initial thinking around how the provisions on transparency in supply chains in the Modern Slavery Act 2015 can be used to drive positive change and help prevent slavery and forced labour from occurring. This guidance will evolve over time and as companies report under the Act, it will be updated to reflect leading practice.