"Where an upright mortice lock/latch is used to ensure that blind and partially sighted people and/or people with limited dexterity have unobstructed access to the keyway, either the cylinder should be above the lever handle where it is more visible and accessible or, if the cylinder is below the handle, the minimum distance between the handle and the keyway of the locking mechanism should be 72 mm."

Cylinder above the lever handle provides unobstructed view and access to the cylinder keyway. 104mm centres provides a large clearance between the lever handle and the cylinder turn / keyway

"It should be possible to operate all door opening furniture one-handed, without the need to grasp or twist. Care should be taken in the selection of security and fire exit fittings, such as short lever turn buttons, bolts, latches or locks, with the aim of making them manageable for all users. Wherever possible, door opening furniture used in conjunction with locks and latches should have a lever action. Knobs with a spherical, circular or similar design, as well as small symmetrical turn buttons, are difficult to use by people with limited dexterity, arthritis or a weak grip. The torque force required to operate keys and cylinder turns should not exceed 0.5 Nm."

Accessible turn for cylinder. No finger grip, no wrist rotations, 70% force reduction

Tigris^® achieved 0.23Nm in an independent test carried out by a Bodycote Warrington APT test house

"The provision of a larger bow on lever and cylinder keys gives users greater control. Alternatively, a hand-grippable key fob can be added to a standard key bow, to aid manipulation of the key."

"The torque force required to operate keys and cylinder turns should not exceed 0.5 Nm."

Accessible key bow option to assist key manipulation.

Tigris^® achieved 0.23Nm in an independent test carried out by a Bodycote Warrington APT test house

"Lock/latch backset of at least 54mm from the door edge."

The large backset of up to 70mm increases the space in which to 'work'