The European Commission has recently published the Study to support the REFIT evaluation of Directive 2001/42/EC on the assessment of the effects of certain plans and programmes on the environment (SEA Directive) that Milieu carried out with Collingwood Environmental Planning. The study assessed the effectiveness, efficiency, coherence, relevance and added value of the SEA Directive and provided an evidence-based analysis of the performance of the Directive from the date of its application (21 July 2004).