a lock assembly including a lock bolt , a first hub , a first electrically powered hub locker assembly and a first manually driven assembly . the lock bolt is movable between a latching position and ah unlatching position . the first hub is adapted to move the lock bolt in response to movement of a first handle . the first electrically powered hub locker assembly is positionable to selectively prevent or allow movement of the lock bolt in response to torque being applied to the first handle . the first electrically powered hub locker assembly is connectable to a first power source . the first manually driven assembly is adapted for selectively preventing or allowing transmission of power from the first power source to the first electrically powered hub locker assembly .