An apparatus comprising: a fence (108, 1108) couplable to a wing (104, 1104) of an aircraft (100, 1100), the fence being movable relative to the wing between a stowed position in which a panel (142, 1144) of the fence extends along a skin (114, 1114) of the wing, and a deployed position in which the panel extends at an upward angle away from the skin, the panel configured to impede a spanwise airflow along the wing when the fence is in the deployed position; a latching actuator (148, 1150) movable between a first position in which the latching actuator maintains the fence in the stowed position, and a second position in which the latching actuator releases the fence from the stowed position, the latching actuator configured to move from the first position to the second position in response to a control signal received at the latching actuator; and a biasing actuator (316, 1146) configured to move the fence from the stowed position to the deployed position in response to the latching actuator being moved from the first position to the second position characterised in that the latching actuator comprises an electromechanical latch (402, 1402) having a solenoid (404, 1404) and an armature (406, 1406) operatively coupled to the solenoid, the solenoid configured to cause the armature, in response to the control signal, to move from a first position in which the armature maintains the fence in the stowed position to a second potion in which the armature releases the fence from the stowed position, optionally wherein the electromechanical latch has a trapezoidal cross-sectional shape wherein the electromechanical latch is configured to: engage the armature with a lip (410, 1410) of the panel when the armature is in the first position and the fence is in the stowed position, wherein the engaging maintains the fence in the stowed position; and disengage the armature from the lip of the panel when the armature is in the second position, wherein the disengaging releases the fence from the stowed position and enables the fence to move from the stowed position to the deployed position. a fence (108, 1108) couplable to a wing (104, 1104) of an aircraft (100, 1100), the fence being movable relative to the wing between a stowed position in which a panel (142, 1144) of the fence extends along a skin (114, 1114) of the wing, and a deployed position in which the panel extends at an upward angle away from the skin, the panel configured to impede a spanwise airflow along the wing when the fence is in the deployed position; a latching actuator (148, 1150) movable between a first position in which the latching actuator maintains the fence in the stowed position, and a second position in which the latching actuator releases the fence from the stowed position, the latching actuator configured to move from the first position to the second position in response to a control signal received at the latching actuator; and a biasing actuator (316, 1146) configured to move the fence from the stowed position to the deployed position in response to the latching actuator being moved from the first position to the second position characterised in that the latching actuator comprises an electromechanical latch (402, 1402) having a solenoid (404, 1404) and an armature (406, 1406) operatively coupled to the solenoid, the solenoid configured to cause the armature, in response to the control signal, to move from a first position in which the armature maintains the fence in the stowed position to a second potion in which the armature releases the fence from the stowed position, optionally wherein the electromechanical latch has a trapezoidal cross-sectional shape wherein the electromechanical latch is configured to: engage the armature with a lip (410, 1410) of the panel when the armature is in the first position and the fence is in the stowed position, wherein the engaging maintains the fence in the stowed position; and disengage the armature from the lip of the panel when the armature is in the second position, wherein the disengaging releases the fence from the stowed position and enables the fence to move from the stowed position to the deployed position. engage the armature with a lip (410, 1410) of the panel when the armature is in the first position and the fence is in the stowed position, wherein the engaging maintains the fence in the stowed position; and disengage the armature from the lip of the panel when the armature is in the second position, wherein the disengaging releases the fence from the stowed position and enables the fence to move from the stowed position to the deployed position.