ESRC - the UK's largest funding organisation for economic and social issues.
The Leverhulme Trust - funds original research in all subject areas.
The British Academy - UK expert body that speaks for humanities and social sciences. Consists of fellowship, funding body and 'voice' which includes contributing evidence to strengthen policy making, and a Public Policy Programme.
Wellcome Trust - one of the largest sources of funding for biomedical research and medical humanities, including fellowships and major initiatives. Supports up to £10 million Public Engagement funding.
Arts and Humanities Research Council (AHRC) - funds research and postgraduate study in the arts and humanities. AHRC has a Public Policy Advisory Group and activities to support public policy impact of arts and humanities research including an Engaging with Government Programme. Further details at: http://www.ahrc.ac.uk/What-We-Do/Strengthen-research-impact/Inform-public-policy/Pages/Inform-public-policy.aspx
NERC - Natural Environment Research Council - funds environmental, climate change, plant and earth sciences research.