So another x-ray later and it still isn’t definitely fractured. The doctor reckons probably 90% certain that it is. To find out for sure would need a bone scan, which involves a dose of radiation equivalent to 180 chest x-rays. The decision is mine, so I opt for the plaster (the several hours hanging around waiting for the radio-active dye to circulate and accumulate is almost as much of a deterrent as the potential cancer).
The difficulty of diagnosis is a good sign. The fracture hasn’t moved, so it should have no problem healing in five weeks. And I can drive with the plaster – which isn’t plaster these days but some magic lightweight setting bandage thing.