A company has been fined £350,000 after the catastrophic collapse of a storage tank at its premises, which left a self-employed worker with life-changing injuries. The Health and Safety Executive (HSE) investigated the incident, which occurred on 21 June 2023 at an offshore supply base. The base handles around two thousand ship movements per year, supplying North Sea oil and gas installations with deck cargoes and quantities of fluids. Worker, a 62-year-old self-employed rope access technician, was on site conducting surveys of storage tanks when Tank 7 — a bolted steel tank holding approximately 480,776 liters of calcium chloride solution weighing around 700 tons — catastrophically ruptured without warning. He was almost immediately immersed to chest height in the released fluid. He was subsequently found slumped over the wheel of a nearby cherry picker, which itself, along with a Ford Transit pickup, a small skip, and the cherry picker — weighing twelve and a half tons — had all been displaced by the force of the escaping fluid. The worker sustained a double fracture of his spine and pelvis, a lacerated liver, a punctured lung, multiple rib fractures, a fractured sternum, a fractured wrist, and extensive chemical burns requiring skin grafts. He has not worked since the incident and is unable to climb ladders or work at height; his injuries are described as life-changing.