So, this is the second combination lock we have had fail. As you can see I drew on my extensive knowledge of lock pickery, and then just carried out a frenzied attack on it, focussing on the relatively soft brass rather than the hardened shackle. Took me 40 minutes, 2 hacksaw blades, and a broken screwdriver to destroy it. Probably not a lot of chance getting this one replaced under guarantee, not in this state. There is a new new lock on the gate, with the same old combination.