TNA UK - 'Plugged In, Powered Up'
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The National Archives UK play an active role in storing and preserving digital material created by UK government.
They are also the maintainers of DROID (which you can use to identify file formats), and PRONOM (the file format registry).
Their 'Plugged In, Powered Up' strategy was created in answer to the needs of archiving professionals in the digital preservation sector. It offers workflows, case studies, toolkits, and mentoring.