UK bomb-disposal teams were having continuing problems rendering safe with German Butterfly bombs because no examples had been safely dismantled to learn the best process. This was because butterfly bombs were specifically designed to detonate if they were disturbed in any way. Whilst dealing with eight butterfly bombs which had fallen on RAF Harlaxton and failed to explode, Flight Sergeant Hanford of RAF Bomb Disposal (based at RAF Digby) noticed that the arming rods on the bombs had not fully unscrewed themselves i.e. the fuzes were not fully armed. Hanford carefully screwed the arming rods back into the fuze pockets by hand, thereby enabling the bomb disposal scientists to safely dismantle the fuze mechanisms, learn how they worked and develop counter-measures. Highly useful information in the form of diagrams and detailed explanations were then distributed to bomb disposal technicians for instructional purposes. Hanford was later awarded the British Empire Medal for this feat of extreme bravery.