Thermal control

A thermal control 1 suitable for a cordless electrical appliance, such as a kettle, comprises a thermal actuator 4, a switch, a sliding member 6 and a latch 7. The cordless electrical appliance comprises a heater and a first cordless electrical connector 13 for connection to a second cordless electrical connector 20 suitable for electrical supply to the heater. The thermal actuator is arranged to change reversibly from a first state to a second state in response to an overheat condition of the heater. The switch is suitable for electrically connecting the heater to the first cordless connector. The switch is biased to be closed. The sliding member is arranged to be actuated by the thermal actuator in the second state so as to open the switch. The latch latches the sliding member so as to hold the switch open when the first electrical connector is connected to the second electrical connector, and to release the sliding member so as to allow the switch to close when the first and second cordless connecters are separated.