Short video on how British Standard mortice locks work and the options open to locksmiths in opening them. (Disclaimer: please note this is not a definitive guide in how to open mortice locks and we will take no responsibility if damage is done to doors/locks as a result of watching this video. The opening of mortice locks without a key requires knowledge and experience). **Correction during the video I say cut the stump off it should be cut the bolt off.**