singspeed I think in London at least, professional thieves DO carry the extra long boltcutters, and some have angle grinders. There's a photo somewhere on this forum, maybe even this thread, of some middle-aged guy with boltcutters in hand, and pilfered bike in the other. 10mm chains are not up to the job, unless the owner has huge luck, like you do.
singspeed I think in London at least, professional thieves DO carry the extra long boltcutters, and some have angle grinders. There's a photo somewhere on this forum, maybe even this thread, of some middle-aged guy with boltcutters in hand, and pilfered bike in the other. 10mm chains are not up to the job, unless the owner has huge luck, like you do.