Every CILIP President has a theme. In David Stewart's Presidential year in 2019, one of his themes was the need to focus on our own evidence base in libraries and therefore research. In the NHS "evidence-based healthcare" has been an important driver for change since the 1990s. Evidence based healthcare led directly to evidence based librarianship and that too has been a powerful agent for change in NHS library and knowledge services. Nevertheless, there is much more to do – the power of

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... e needs to be recognised across all our professional groups and we need a much more coordinated approach to its funding, development and dissemination.