I’m interested in enhancing my security skills. Has anyone had a good experience with an online SIA Door Supervisor course?

Yes, I've had a great experience with an online course that was both informative and flexible. I used this site https://my-licence.co.uk/product/sia-door-supervisor-course/. It covered all the essentials needed to work effectively as a door supervisor. The content was up-to-date and very practical.