[...]the continued, known, unmitigated risk to life for all Hawk back seat passengers, without front seat command ejection.
Only if briefings are inadequate and flight profiles are inappropriate. Passengers in the back on a straight medium level transit are safe enough - as they were in the Gnat. Far safer than in the Meteor 7 when they didn't even have a bang seat. Or Chipmunk or Tiger Moth, come to think of it.....