An actuator arrangement for controlling a first latching arrangement of a first dual body rocker arm for controlling an intake valve of an internal combustion engine, and for controlling a second latching arrangement of a second dual body rocker arm for controlling an exhaust valve of the internal combustion engine, the first and second dual body rocker arms each including a first body, a second body, and the latching arrangement controllable to latch and unlatch the first body and the second body. The actuator arrangement includes: an actuation source; and an actuation transmission arrangement for transmitting movement of the actuation source to both the first latching arrangement and the second latching arrangement. In use, movement of the actuation source causes, via the actuation transmission arrangement, control of the first latching arrangement and of the second latching arrangement in common.

An actuator arrangement for controlling a first latching arrangement of a first dual body rocker arm for controlling an intake valve of an internal combustion engine, and for controlling a second latching arrangement of a second dual body rocker arm for controlling an exhaust valve of the internal combustion engine, the first and second dual body rocker arms each including a first body, a second body, and the latching arrangement controllable to latch and unlatch the first body and the second body. The actuator arrangement includes: an actuation source; and an actuation transmission arrangement for transmitting movement of the actuation source to both the first latching arrangement and the second latching arrangement. In use, movement of the actuation source causes, via the actuation transmission arrangement, control of the first latching arrangement and of the second latching arrangement in common.