A method of controlling wireless communication between a first wireless access point and one or more user devices , the first wireless access point having a wireless communication interface for wireless communication with said one or more user devices using one or more wireless communication channels in a predetermined frequency range, the first wireless access point being configured to communicate with one or more other wireless access points , the first wireless access point and the one or more other wireless access points each having a radar detector operable to detect possible radar signals received by the access point within said predetermined frequency range and each being configured to provide information indicative of whether or not possible radar signals have been detected within said predetermined frequency range; the method comprising: said first wireless access point receiving communications relating to information provided by said one or more other wireless access points , and starting or stopping said wireless communication with said one or more user devices using a wireless communication channel in said predetermined frequency range in dependence on information indicative of whether or not possible radar signals have been detected within said predetermined frequency range by said first wireless access point and on information provided by said one or more other wireless access points indicative of whether or not possible radar signals have been detected within said predetermined frequency range by said one or more other wireless access points ; characterised in that the starting or stopping of said wireless communication between said first wireless access point and said one or more user devices is in response to detection by said first wireless access point of one or more possible radar signals within said predetermined frequency range, said wireless communication being started or stopped in dependence on a detection threshold, said detection threshold itself being updated in dependence on said information provided by said one or more other wireless access points indicative of whether or not possible radar signals have been detected within said predetermined frequency range by said one or more other wireless access points . said first wireless access point receiving communications relating to information provided by said one or more other wireless access points , and starting or stopping said wireless communication with said one or more user devices using a wireless communication channel in said predetermined frequency range in dependence on information indicative of whether or not possible radar signals have been detected within said predetermined frequency range by said first wireless access point and on information provided by said one or more other wireless access points indicative of whether or not possible radar signals have been detected within said predetermined frequency range by said one or more other wireless access points ; characterised in that the starting or stopping of said wireless communication between said first wireless access point and said one or more user devices is in response to detection by said first wireless access point of one or more possible radar signals within said predetermined frequency range, said wireless communication being started or stopped in dependence on a detection threshold, said detection threshold itself being updated in dependence on said information provided by said one or more other wireless access points indicative of whether or not possible radar signals have been detected within said predetermined frequency range by said one or more other wireless access points . <EOS>