An aircraft braking system comprising: a brake stack (112, 212); and a hybrid brake actuator, comprising: a housing; a compression chamber; a volume defined within the housing; wherein the compression chamber is configured to receive fluid from the volume defined within the housing; an electromechanical actuator (222-1, 222-2) coupled to the housing, the EMA (222-1, 222-2) configured to create hydraulic pressure and thereby displace the fluid from the compression chamber; a hydraulic adjuster (224-1 to 224-6) configured to receive the fluid via the housing and in response to the EMA (222-1, 222-2) displacing the fluid, wherein the hydraulic adjuster (224-1 to 224-6) is configured to exert a force on said brake stack (112; 212); wherein the hydraulic adjuster (224-1 to 224-6) comprises a piston (225-1 to 225-6;) that is configured to extend from the hydraulic adjuster (224-1 to 224-6); and characterised in that: the hybrid brake actuator is coupled to the brake stack (112; 212); and the EMA (222-1, 222-2) defines the compression chamber, and further characterised by the compression chamber having one or more fluid ports configured to receive and exhaust fluid, wherein fluid is conducted to the or a first fluid port in response to an electronic control of the EMA (222-1, 222-2), the fluid is displaced by the EMA (222-1, 222-2) and exhausted from the compression chamber through the or a second fluid port to the hydraulic adjuster (224-1 to 224-6) which causes the adjuster piston (225-1 to 225-6) to extend from the hydraulic adjuster (224-1 to 224-6) to exert a force on the brake stack (112, 212), wherein a longitudinal centerline A-A' of EMA is parallel to the top surface of the housing and parallel to the brake stack (112, 212); wherein the EMA is directly attached to the housing and wherein the longitudinal center line A-A' of EMA is oriented tangentially with respect to a radial plane going through its connection with the housing. a brake stack (112, 212); and a hybrid brake actuator, comprising: a housing; a compression chamber; a volume defined within the housing; wherein the compression chamber is configured to receive fluid from the volume defined within the housing; an electromechanical actuator (222-1, 222-2) coupled to the housing, the EMA (222-1, 222-2) configured to create hydraulic pressure and thereby displace the fluid from the compression chamber; a hydraulic adjuster (224-1 to 224-6) configured to receive the fluid via the housing and in response to the EMA (222-1, 222-2) displacing the fluid, wherein the hydraulic adjuster (224-1 to 224-6) is configured to exert a force on said brake stack (112; 212); a housing; a compression chamber; a volume defined within the housing; wherein the compression chamber is configured to receive fluid from the volume defined within the housing; an electromechanical actuator (222-1, 222-2) coupled to the housing, the EMA (222-1, 222-2) configured to create hydraulic pressure and thereby displace the fluid from the compression chamber; a hydraulic adjuster (224-1 to 224-6) configured to receive the fluid via the housing and in response to the EMA (222-1, 222-2) displacing the fluid, wherein the hydraulic adjuster (224-1 to 224-6) is configured to exert a force on said brake stack (112; 212); wherein the hydraulic adjuster (224-1 to 224-6) comprises a piston (225-1 to 225-6;) that is configured to extend from the hydraulic adjuster (224-1 to 224-6); and characterised in that: the hybrid brake actuator is coupled to the brake stack (112; 212); and the EMA (222-1, 222-2) defines the compression chamber, and further characterised by the compression chamber having one or more fluid ports configured to receive and exhaust fluid, wherein fluid is conducted to the or a first fluid port in response to an electronic control of the EMA (222-1, 222-2), the fluid is displaced by the EMA (222-1, 222-2) and exhausted from the compression chamber through the or a second fluid port to the hydraulic adjuster (224-1 to 224-6) which causes the adjuster piston (225-1 to 225-6) to extend from the hydraulic adjuster (224-1 to 224-6) to exert a force on the brake stack (112, 212), wherein a longitudinal centerline A-A' of EMA is parallel to the top surface of the housing and parallel to the brake stack (112, 212); wherein the EMA is directly attached to the housing and wherein the longitudinal center line A-A' of EMA is oriented tangentially with respect to a radial plane going through its connection with the housing. the hybrid brake actuator is coupled to the brake stack (112; 212); and the EMA (222-1, 222-2) defines the compression chamber, and further characterised by the compression chamber having one or more fluid ports configured to receive and exhaust fluid, wherein fluid is conducted to the or a first fluid port in response to an electronic control of the EMA (222-1, 222-2), the fluid is displaced by the EMA (222-1, 222-2) and exhausted from the compression chamber through the or a second fluid port to the hydraulic adjuster (224-1 to 224-6) which causes the adjuster piston (225-1 to 225-6) to extend from the hydraulic adjuster (224-1 to 224-6) to exert a force on the brake stack (112, 212), wherein a longitudinal centerline A-A' of EMA is parallel to the top surface of the housing and parallel to the brake stack (112, 212); wherein the EMA is directly attached to the housing and wherein the longitudinal center line A-A' of EMA is oriented tangentially with respect to a radial plane going through its connection with the housing.