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The Forensic Psychology section of the information sheet webpage below will give you an overview of what kind of work experience is relevant, and will help you to identify opportunities:
https://www.york.ac.uk/media/studenthome/workandvolunteering/infosheets/workexperience/Psychology-work-experience.pdfstudents/work-volunteering-careers/ideas/sectors/psychology-careers/
You might also find the following job sector page useful:
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