121.6 MHz conversion to 8.33 kHz VHF voice channel spacing

By 1st January 2026 any remaining exemptions to conversion to 8.33kHz spacing expire, this includes 121.6MHz, the channel used by Aerodrome Rescue & Fire Fighting Services (RFFS). This will mean that all ground radios and RFFS appliance radios will need to be upgraded if they do not have the 8.33Khz capability. Aerodromes are encouraged to consider their plans for conversion of this channel to 121.605. 

Further technical information can be requested at spectrum@caa.co.uk.