AlR,
AvTur by itself will not ignite.
It is the vapour that ignites.
Leaving it to pool and give off vapour, in the vacinity of an ignition source is dangerous.
Dumping it via the bomb bay, and allowing it to spray (and vapourise) in the vacinity of the engine exhaust could be equally spectacular.
Quess the answer is to get down PDQ.
I think AC Ovee should be an MoD spokesman or morale officer, well informed person that they be.