Methods and apparatus are disclosed for controlling wireless communication between a first wireless access point and one or more user devices, the first access point having an interface for communication with the user devices on one or more wireless communication channels in a predetermined frequency range, and also being configured to communicate with one or more other wireless access points. The access points each have a radar detector operable to detect possible radar signals within the frequency range, and are configured to provide information indicative of whether or not possible radar signals have been detected. The first access point receives communications relating to information provided by the other access points, and starts or stops wireless communications with its user devices on a particular channel based on whether or not it has detected possible radar signals together with whether or not the other wireless access points have detected possible radar signals.