This Dreadnought Defender ABP underfloor safe at a petrol station in Bromborough, Wirral would not open with the key. Initial inspection showed that the lock was loose and we could see that one of the three relocking devices had activated which meant that this was going to be a drill open job. Having drilled through the extremely tough lid it became apparent that all three relockers had fired which meant a second hole had to be made to deactivate them and finally allow the bolts to be withdrawn to open it.