https://www.reed.co.uk/courses/expert-door-supervision-key-skills-and-techniques/433155
Take this Expert Door Supervision: Key Skills and Techniques course and gain essential Bodyguard skills today. Advance your career prospects with Reed Courses.
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https://www.gamblingcommission.gov.uk/guidance/guidance-to-licensing-authorities/part-33-door-supervision
The Gambling Commission's guidance to door supervision for licensing authorities.
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