A torque motor comprising: a lower pole piece and an upper pole piece with respect to a vertical axis of the torque motor; and an armature that is located between the lower pole piece and the upper pole piece, the armature comprising first and second opposed arm portions (152, 154), each arm portion (152, 154) being positioned between the lower pole piece and the upper pole piece; wherein at least one of the lower pole piece and the upper pole piece are formed by two respective arcuate members (122, 132) that are attached to one another at diametrically opposed attachment portions (124, 134), wherein each arcuate member extends in opposite directions and follows a generally circular path defining a perimeter of said pole piece (120,130); characterised in that each diametrically opposed attachment portion (124,134) is configured as a block of material extending vertically away from a respective one of the first and second opposed arm portions (152, 154), the respective arcuate members (122,132) extending from the block of material, wherein each arcuate member (122, 132) is formed by three sections (122A-C, 132A-C), wherein a first section (122A, 132A) connects to one of the diametrically opposed attachment portions (124, 134) and extends vertically and circumferentially away from the diametrically opposed attachment portion (124, 134) to the second section (122B, 132B), which extends circumferentially around the circular path, wherein the second section (122B, 132B) then extends into a third section (122C, 132C) that extends vertically and circumferentially towards the other of the diametrically opposed attachment portions (124, 134). a lower pole piece and an upper pole piece with respect to a vertical axis of the torque motor; and an armature that is located between the lower pole piece and the upper pole piece, the armature comprising first and second opposed arm portions (152, 154), each arm portion (152, 154) being positioned between the lower pole piece and the upper pole piece; wherein at least one of the lower pole piece and the upper pole piece are formed by two respective arcuate members (122, 132) that are attached to one another at diametrically opposed attachment portions (124, 134), wherein each arcuate member extends in opposite directions and follows a generally circular path defining a perimeter of said pole piece (120,130); characterised in that each diametrically opposed attachment portion (124,134) is configured as a block of material extending vertically away from a respective one of the first and second opposed arm portions (152, 154), the respective arcuate members (122,132) extending from the block of material, wherein each arcuate member (122, 132) is formed by three sections (122A-C, 132A-C), wherein a first section (122A, 132A) connects to one of the diametrically opposed attachment portions (124, 134) and extends vertically and circumferentially away from the diametrically opposed attachment portion (124, 134) to the second section (122B, 132B), which extends circumferentially around the circular path, wherein the second section (122B, 132B) then extends into a third section (122C, 132C) that extends vertically and circumferentially towards the other of the diametrically opposed attachment portions (124, 134).