"Rob" wrote in message
om...
With access from the inside, and about a 3mm view of the 'bolt' between
the striking plate and the door, what's the best and least destructive way
of removing this (lost key) external door lock?

Thanks, Rob

When the mortice lock stuck in our office, I watched a joiner get in by
banging in some wedges between the door and frame. There was enough give
between them to spring the bolt past the striker plate.