A method of determining the location of a user in an area. A user requests a transmitting device from a transmitter providing device. The transmitter providing device associates an identification code with the user, and the transmitting device transmits that identification code. One or more of receiving devices receive the identification code transmitted by the transmitting device, and send details of the received identification code to the user location determining device. The user location determining device then determines the location of the user, using the received details from the one or more receiving devices.