Sorry Bladecrack but as a prehospital care practitioner I am far from detached
This wasn't a badly fractured leg. If you look at the press article it was merely a suspected fracture, and newspapers are so well known for melodrama I am happy to postulate it was merely a strain. But whether or not the leg was broken, ambulance services have a range of responses including senior officers, paramedic vehicles, ambulances, first responders, pre care practitioners and even midwives and GPs
If the local control confirms they had absolutely nobody and couldn't pull a response unit from a less urgent task such as a GPs request for admission, then so be it but in reality it is very rare for an ambulance service to be so over stretched in an urban setting to justify using a helicopter merely to meet government response. Even when they are stretched to the limit a specific plan is used which don't involve helicopters.