Ranger One wrote:
Derfred, Hunter isn't supersonic, tops out at ~0.95M IIRC.
Not so. The Hunter was supersonic in a dive; even with less thrust as compared with the F6, the T7 exceeded M1.0 quite easily thanks to its area ruled fuselage.
Entirely irrelevant for this accident though. But yes, use of 23° flap is quite normal for Hunter aerobatics.