secrec and you think that matters to LE in the UK (silent prayer)? As far as I am aware, they will take circumstantial evidence happily if it suits their case, provided that the technical ability is present on device (running GOS) and can be proven (by boot key hash). As it was already stated multiple times, the duress PIN is not a "get out of jail free" card. It's more of a "don't go for life because what is on the phone is worse".