RIP guys.
I presume that OAA use the Zlin for aeros (but remember that most eye-witness accounts are notoriously misleading and inaccurate). IMHO definitely not the weather for aeros if that is the case. A tragedy all the same. (This ol' stager has marvelled for over 30 years at Oxford's safety record - considering the number of aircraft in the circuit and surrounding areas at any one time.)
bm