Robot

A method of operating a robot 103 comprises generating a representation of an environment 109 of the robot 103 by operating one or more sensors of the robot to sense a set of parameters representative of the environment and creating or receiving from an electronic user device 105 a list of objects 107 in the environment 109 and associated identifiers for each object 107 in the list and then receiving control data from the electronic user device 105 which control data comprises an identifier for an object 107 in the generated list that a user of the electronic user device 105 wishes to locate within the environment 109. In response to receipt of the control data, the robot 103 and the one or more sensors are operated to search the environment 109 to determine a location of the identified object 107. An indication of the determined location may be transmitted to the electronic user device 105. The list of objects may include the last known location for at least one object 107.