We are proud to have have had advanced APA accredited training (by PEAK Credibility Assessment Centre in the USA) in the testing of Post Conviction Sex Offenders. In the UK, the most testing done around the country is by the Police / Parole board - in testing serious sex offenders once released from prison. No examiner can conduct these tests unless they have the experience, qualification, ethics and professional expertise. This program is detailed on the Gov.uk website.
https://www.gov.uk/government/publications/domestic-abuse-bill-2020-factsheets/mandatory-polygraph-tests-factsheet