In simple terms, is a 'fatty embolus' something akin to bone marrow getting into the bloodstream?
Also, how did the passenger sustain the injury? Were there other lingering possibilities such as concussion to worry about? Whilst stumbling and breaking an ankle in the loo-queue following this severe turbulence (the maximum vertical accelerations experienced were +2.367g and -0.352g), did the passenger bang his/her head?
Presumably the flight crew were in contact with some duty doctor or other at Heathrow when they made their decision?
I note that 5 crew members also sustained minor injuries....
Hmmm........