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The TUC has more information on RSI in the health and safety section of its main website.
The Hazards magazine website has resources on strain injuries.
The European Agency for Safety and Health at Work also provides information on MSDs.
The European Commission has been considering a new directive to cover all MSDs, including RSI, with the exception of vibration. However no consensus has been reached. You can track progress on the directive on the HSE website.