The Adult Education Budget (AEB) plays a key role in the provision of skills programmes for Londoners. Since the delegation of the AEB to the Mayor of London in August 2019, the Greater London Authority (GLA) has been granted some flexibility to align AEB policy and commissioning with local priorities. Some of these changes have been designed to make the AEB more accessible to London's migrant communities, and ensure that London's diverse migrant communities can acquire the skills they need to succeed. Learning and Work Institute (L&W) was commissioned by the GLA to review the effectiveness of the AEB flexibilities introduced to accommodate London's migrant communities' skills needs. This qualitative investigation encompassed a scoping review, and participatory research involving (1) AEB-funded providers, (2) service users (adult learners and non-learners from migrant, refugee, and asylum-seeking backgrounds), and (3) wider stakeholders. The research project aims to secure impact for London's residents and communities, in line with the Mayor's strategic priorities, as set out in the Mayor's Skills Roadmap for London. [This report was commissioned by the Greater London Authority (GLA).]