Gliss Training In London offers SSSTS courses for construction site supervisors. The 2-day course covers health, safety, and legal responsibilities, valid for 5 years. For more info, contact +44 7900 852621 or visit GlissTraining.com. Address: Burrell House, 44 Broadway, Stratford, E15 1XH. https://glisstraining.com/course/sssts-training-london/