Fifteen people needed hospital treatment after the evacuation, 14 of them for suspected fractures.
Suspected is the operative word. A displaced or compound fracture would have been instantly apparent.
AFAIK there were no compound fractures reported. Suspected fracture? Yes of course. Anywhere which has the simplest of x-ray facilities would be able to determine if a fracture has occurred. Triage would identify the potential for a fracture and direct the casualty to the appropriate place. Tooting would have been well able to deal with that. London Ambulance did triage and effectively so.