Emergency & Communication Frequencies
Meshtastic
License-free. 869.525 MHz is widely used for general texting and emergency coordination.
CB Radio (Citizen Band)
UK 40 Channels. Channel 9 is the traditional emergency channel. Channel 19 for mobile/trucker info.
PMR446 (Walkie-Talkies)
License-free. Channel 8 (446.09375 MHz) is widely used for general calling and emergency coordination.
HAM Radio (Amateur)
Requires a license. 145.500 MHz (2m) and 433.500 MHz (70cm) are standard UK calling frequencies.
Gov Broadcasts
In a national emergency, tune to BBC Radio 4 (92-95 FM or 198 LW). This is the designated station for government instructions.