Hong Kong’s Ocean Park has been urged to enhance its safety measures after an ageing observation tower broke down for the second time in two years, leaving 42 people stranded 70 metres above the ground. Lawmakers called for changes on Tuesday, a day after the incident sent firefighters rushing to the scene and caused the ride to stop working for more than two hours. While 40 customers and a staff member were able to make their own way to the ground through a safety passage inside the tower, one woman with mobility difficulties was only able to escape after a firefighter equipped with rope-rescue gear helped lower her to safety.