Fireground radio frequencies
Eight spot frequencies are available in the 450-470 MHz UHF band for ‘at incident’ voice communications; four simplex and two duplex channels. These frequencies are licensed to fire services by Ofcom. Two additional frequencies, currently licensed to the Home Office are allocated to the fire service. Each frequency listed in the current license is the centre of a 25 kHz channel. This spacing reduces the risk of interference from radios transmitting on adjacent frequencies by providing a guard band either side of the 12.5 kHz operating channel. A single frequency is also allocated to BA telemetry.