Policy Hub - Evaluating Policy - Guidance on the role of evaluation in policy making.
Government Social Research - Government Social Research Unit's website
Magenta Book - The Government Social Research Unit's guidance notes on policy evaluation.
United Kingdom Evaluation Society - Website provides information about the activities of the United Kingdom Evaluation Society and news about other evaluation activities, jobs, contracts, events, and resources in the UK and internationally.
Campbell Collaboration - A collaboration of social scientists promoting the use of evidence in policy making.
Evaluation at the Research Methods Knowledge Base - Introduction to evaluation and its role in decision making.
Highways Agency - Search their website for examples of the Post Opening Project Evaluation (POPE) methodology