There was no 'manual reversion' in the Bucc, so if it ran out of fuel in the air, it would crash.
A Bucc did not need blow on for all landings; unblown landings in the appropriate configuration were quite routine.
It is quite possible that some form of GS HYD failure required a RHAG engagement and it would have made obvious sense to divert to RAF Honington when it was a Buccaneer station.
I cannot recall the datum speeds for specific Bucc configurations as it's around 46 years since I last flew one. But there's no way even a heavy unblown landing would have been at the speeds quoted.