A temperature control system for temperature control of a patient comprising: a first peripheral fluid circuit for the passage of a first heat exchanger fluid, the first peripheral fluid circuit comprising: a first fluid connection for fluidly connecting a first peripheral heat exchanger in series with a first peripheral-evaporator heat exchanger; and a first peripheral pump for pumping the first heat exchanger fluid around the first peripheral fluid circuit; a first evaporator circuit for the passage of an evaporator heat exchanger fluid through the first peripheral-evaporator heat exchanger, the first evaporator circuit comprising: a first evaporator pump for pumping the evaporator heat exchanger fluid around the first evaporator circuit; an evaporator tank in series with the first peripheral-evaporator heat exchanger and first evaporator pump, the first evaporator pump being operable to pump the evaporator heat exchanger fluid from the evaporator tank to the first peripheral-evaporator heat exchanger and back to the evaporator tank; the first evaporator circuit being fluidly isolated from the first peripheral fluid circuit; and the first peripheral-evaporator heat exchanger being configured to permit heat exchange between the heat exchanger fluids wherein there is provided at least one temperature sensor (340,342) in the peripheral fluid circuit for the measurement of temperature of heat exchanger fluid in said circuit, there is provided a controller in communication with the pumps (318,322), and which controls the pumps in dependence upon signals indicative of temperature received from the temperature sensor(s) (340,342), and characterised in that there is provided a first peripheral reservoir in the first peripheral fluid circuit in series with the first peripheral-evaporator heat exchanger and first peripheral pump, operable such that the first heat exchanger fluid flows from the first peripheral-evaporator heat exchanger to the first peripheral reservoir, then via the first peripheral pump to the first peripheral heat exchanger and then to the first peripheral-evaporator heat exchanger. a first peripheral fluid circuit for the passage of a first heat exchanger fluid, the first peripheral fluid circuit comprising: a first fluid connection for fluidly connecting a first peripheral heat exchanger in series with a first peripheral-evaporator heat exchanger; and a first peripheral pump for pumping the first heat exchanger fluid around the first peripheral fluid circuit; a first fluid connection for fluidly connecting a first peripheral heat exchanger in series with a first peripheral-evaporator heat exchanger; and a first peripheral pump for pumping the first heat exchanger fluid around the first peripheral fluid circuit; a first evaporator circuit for the passage of an evaporator heat exchanger fluid through the first peripheral-evaporator heat exchanger, the first evaporator circuit comprising: a first evaporator pump for pumping the evaporator heat exchanger fluid around the first evaporator circuit; an evaporator tank in series with the first peripheral-evaporator heat exchanger and first evaporator pump, the first evaporator pump being operable to pump the evaporator heat exchanger fluid from the evaporator tank to the first peripheral-evaporator heat exchanger and back to the evaporator tank; a first evaporator pump for pumping the evaporator heat exchanger fluid around the first evaporator circuit; an evaporator tank in series with the first peripheral-evaporator heat exchanger and first evaporator pump, the first evaporator pump being operable to pump the evaporator heat exchanger fluid from the evaporator tank to the first peripheral-evaporator heat exchanger and back to the evaporator tank; the first evaporator circuit being fluidly isolated from the first peripheral fluid circuit; and the first peripheral-evaporator heat exchanger being configured to permit heat exchange between the heat exchanger fluids wherein there is provided at least one temperature sensor (340,342) in the peripheral fluid circuit for the measurement of temperature of heat exchanger fluid in said circuit, there is provided a controller in communication with the pumps (318,322), and which controls the pumps in dependence upon signals indicative of temperature received from the temperature sensor(s) (340,342), and characterised in that there is provided a first peripheral reservoir in the first peripheral fluid circuit in series with the first peripheral-evaporator heat exchanger and first peripheral pump, operable such that the first heat exchanger fluid flows from the first peripheral-evaporator heat exchanger to the first peripheral reservoir, then via the first peripheral pump to the first peripheral heat exchanger and then to the first peripheral-evaporator heat exchanger.