Two climbers were injured on Sunday afternoon when they fell 30 feet after a boulder came away from the cliff face at St Govans Head.
The man and a 15-year-old boy had been attempting a climb called Zounds.
In the fall, the man sustained injuries to his face and suspected internal injuries, but he managed to climb back up the cliff and call an ambulance.
The boy, who remained at the bottom of the climb, had sustained a bad gash to his head. He was also a diabetic and had missed his insulin injection.
The Air Ambulance, a Sea King helicopter from RAF Chivenor, Tenby and St Govans Coastguard cliff rescue teams all responded to the incident.
The cliff rescue team gave first aid until the Sea King arrived. The boy was then winched on board and flown to Withybush hospital.
The other injured climber was also taken to Withybush, by Air Ambulance. The pair were from a climbing club in Gloucester.
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