A shape memory alloy actuated valve assembly (100, 200), comprising: a valve body, having a fluid inlet and a fluid outlet; a plunger, arranged to open and close a fluid flow path between the inlet and the outlet, and having at least one mechanical connection (121, 122, 123) configured to engage with a shape memory alloy element for actuating the plunger; a support structure having: a front face and a reverse face, the front and reverse faces facing in substantially opposite directions, a plurality of first engagement points for coupling a shape memory alloy element to the support structure, wherein the plurality of first engagement points comprises two first engagement points on the front face and two first engagement points on the reverse face; and a plurality of second engagement points for coupling a shape memory alloy element to the support structure, wherein the plurality of second engagement points comprises two second engagement points on the front face and two second engagement points on the reverse face; a first shape memory alloy element located outside the support structure and arranged between the two first engagement points on the front face and the at least one mechanical connection (121, 123) on the plunger or between the two second engagement points on the front face and the at least one mechanical connection (122, 123) on the plunger, and a second shape memory alloy element located outside the support structure and arranged between the two first engagement points on the reverse face and the at least one mechanical connection (121, 123) on the plunger or between the two second engagement points on the reverse face and the at least one mechanical connection on the plunger (122, 123), wherein the first and second shape memory alloy elements are elongate elements configured to shorten upon activation, wherein the plurality of first engagement points are arranged such that actuation of the first or second shape memory alloy element when extending between and connected to the first engagement points and the at least one mechanical connection (121, 123) on the plunger can move the plunger to open the fluid flow path, wherein the plurality of second engagement points are arranged such that actuation of the first or second shape memory alloy element when extending between and connected to the second engagement points and the at least one mechanical connection (122, 123) on the plunger can move the plunger to close the fluid flow path. a valve body, having a fluid inlet and a fluid outlet; a plunger, arranged to open and close a fluid flow path between the inlet and the outlet, and having at least one mechanical connection (121, 122, 123) configured to engage with a shape memory alloy element for actuating the plunger; a support structure having: a front face and a reverse face, the front and reverse faces facing in substantially opposite directions, a plurality of first engagement points for coupling a shape memory alloy element to the support structure, wherein the plurality of first engagement points comprises two first engagement points on the front face and two first engagement points on the reverse face; and a plurality of second engagement points for coupling a shape memory alloy element to the support structure, wherein the plurality of second engagement points comprises two second engagement points on the front face and two second engagement points on the reverse face; a front face and a reverse face, the front and reverse faces facing in substantially opposite directions, a plurality of first engagement points for coupling a shape memory alloy element to the support structure, wherein the plurality of first engagement points comprises two first engagement points on the front face and two first engagement points on the reverse face; and a plurality of second engagement points for coupling a shape memory alloy element to the support structure, wherein the plurality of second engagement points comprises two second engagement points on the front face and two second engagement points on the reverse face; a first shape memory alloy element located outside the support structure and arranged between the two first engagement points on the front face and the at least one mechanical connection (121, 123) on the plunger or between the two second engagement points on the front face and the at least one mechanical connection (122, 123) on the plunger, and a second shape memory alloy element located outside the support structure and arranged between the two first engagement points on the reverse face and the at least one mechanical connection (121, 123) on the plunger or between the two second engagement points on the reverse face and the at least one mechanical connection on the plunger (122, 123), wherein the first and second shape memory alloy elements are elongate elements configured to shorten upon activation, wherein the plurality of first engagement points are arranged such that actuation of the first or second shape memory alloy element when extending between and connected to the first engagement points and the at least one mechanical connection (121, 123) on the plunger can move the plunger to open the fluid flow path, wherein the plurality of second engagement points are arranged such that actuation of the first or second shape memory alloy element when extending between and connected to the second engagement points and the at least one mechanical connection (122, 123) on the plunger can move the plunger to close the fluid flow path.