Whilst a member of the site team was entering a hoist to travel down a shaft to access a deep excavation power tunnel, their two-way radio which was clipped into their bottom jacket pocket, became caught and fell through a gap (approx. 75mm) between the enclosed platform and the lift. The radio fell 42 metres to the bottom of the pit shaft, but fortunately there were no persons at the shaft bottom at the time.
The alert can be downloaded here and provides some preventative actions to be taken.