A servo valve comprising: first and second nozzles (12b,12a) spaced apart from each other; an elongate control member for controlling fluid flow through the first and second nozzles (12b,12a), the control member being positioned between the nozzles (12b,12a) and having a first end and an opposing second end; and a solenoid assembly surrounding at least a portion of the control member, and configured to translate the control member in response to the solenoid assembly being energised, such that the first end is moved towards the first nozzle and the second end is moved away from the second nozzle, wherein: the solenoid assembly comprises a coil surrounding at least a portion of the control member, and a ferromagnetic member connected to and extending radially outward from the control member concentric with the coil; a first fluid flow path is defined between the first nozzle and the first end; a second fluid flow path is defined between the second nozzle and the second end; the solenoid assembly is configured to translate the control member between a first position, in which the first fluid flow path is restricted or closed by the first end and the second fluid flow path is open, and a second position, in which the first fluid flow path is open and the second fluid flow path is restricted or closed by the second end; the solenoid assembly is configured such that, when it is un-energised, the control member moves to a third position, in which the first and second fluid flow paths are open; the servo valve further comprises a control member biasing member configured to oppose translation of the control member to the first and second positions from the third position; and wherein one of the first and second ends (17a, 17b) includes a stop extending radially outward from the control member, and characterised in that the control member biasing member is retained between the stop and a first axially outer edge of the coil. first and second nozzles (12b,12a) spaced apart from each other; an elongate control member for controlling fluid flow through the first and second nozzles (12b,12a), the control member being positioned between the nozzles (12b,12a) and having a first end and an opposing second end; and a solenoid assembly surrounding at least a portion of the control member, and configured to translate the control member in response to the solenoid assembly being energised, such that the first end is moved towards the first nozzle and the second end is moved away from the second nozzle, wherein: the solenoid assembly comprises a coil surrounding at least a portion of the control member, and a ferromagnetic member connected to and extending radially outward from the control member concentric with the coil; a first fluid flow path is defined between the first nozzle and the first end; a second fluid flow path is defined between the second nozzle and the second end; the solenoid assembly is configured to translate the control member between a first position, in which the first fluid flow path is restricted or closed by the first end and the second fluid flow path is open, and a second position, in which the first fluid flow path is open and the second fluid flow path is restricted or closed by the second end; the solenoid assembly is configured such that, when it is un-energised, the control member moves to a third position, in which the first and second fluid flow paths are open; the servo valve further comprises a control member biasing member configured to oppose translation of the control member to the first and second positions from the third position; and wherein one of the first and second ends (17a, 17b) includes a stop extending radially outward from the control member, and characterised in that the control member biasing member is retained between the stop and a first axially outer edge of the coil.