The following sites will be highlighted, with acknowledgement to the source (A Brief Guide to UK Social Policy Databases, Rebecca Riley from the Idox Information Service, Alliance for Useful Evidence, May 2015):

Databases Description
Ageinfo UK database covering all aspects of ageing and older age, including research and practice in the social and health issues of older age. A bibliographic database of over 55,000 books, articles and reports from the specialist collection held by the Centre for Policy on Ageing. Information covers best practice to develop and implement policy, support and services on ageing; including health and social services; residential and community care; living arrangements; financial inclusion; independent living; citizenship; rights and risks.
ChildData From the National Children’s Bureau charity, ChildData is the only bibliographic database covering all aspects of research and practice in young people’s social care. It is now only available through Social Policy and Practice. Content includes reports, research and resources on early childhood; education and learning; health and wellbeing; involving young people; play; sector improvement; SEN and disability; and vulnerable children.
NSPCC Inform NSPCC Inform includes all forms of case reviews and literature and current awareness bulletins. This database provides research and statistics on child abuse; working with children and families; policy and guidance on child protection; resources; case reviews and learning materials.
Social Care online An electronic library delivered by the Social Care Institute for Excellence, with over 150,000 abstracts covering all aspects of social care, social welfare and social policy, currently free to access through a grant from the Department of Health. It covers information of people with social care needs; those receiving care services; key issues such as integrated services, safeguarding or legislation; Government policy and social work and the social care workforce.
Social Policy and Practice A one-stop-shop for research, analysis and discussion of health and social policy, Social Policy and Practice database holds over 350,000 abstracts on social policy, 30% of content is grey literature. The database made up from selected content from the major providers, Idox Information Service, Social Care Institute for Excellence, National Children’s Bureau and the Centre for Policy on Ageing, (NSPCC data is currently also being added) this is run through Ovid Technologies on a commercial basis.
The Idox Information Service The Idox Information Service it aims to support evidence based policy, by providing authoritative guidance and research support. Today it holds over 200,000 summarised research resources, increasing by 1,000 abstracts per month, across 30 local authority public policy areas including planning, regeneration, social policy and economic development.

The following sites may be of interest

Databases Description
ChiMat The National Child and Maternal Health Intelligence Network is a key source of information, profiles and evidence.
Wales Child Death Review The Child Death Review programme in Wales aims to identify and describe patterns and causes of child death including any trends, and to recommend actions to reduce the risk of avoidable factors contributing to child deaths in Wales.
NCB The National Children’s Bureau report on health inequalities among young children across England, Poor Beginnings.
NICE A wide selection of general resources and topic briefings for Local Authorities.
Kings Fund  A resource for local authorities on improving the public’s health.