The present invention relates to a lock arrangement having a lock (14) and including a first locking device (52) adapted to operate the lock to lock and unlock the lock. A second locking device (68) includes a member (32) moveable between a first and a second position wherein when the member (32) is in the first position the lock is locked and when in the second position the lock is unlocked. Generally the first locking device (52) is key operated and the second locking device (68) is driven by an electric motor (72). The first locking device (52) can operate the lock independently of the member (32) and regardless of its position and when used to lock or unlock the lock can decouple through a clutch mechanism (80) the second locking device (68) from controlling the lock.