Sorry chaps. If you're operating low level in the UK FIR outside controlled airspace the CAA says you should monitor "DEPCOM".
From the AIP Gen 3.4.3
Departing helicopters shall state:
(i) 'To all stations';
(ii) The callsign of the aircraft;
(iii) The location either by name or by reference to a readily identifiable feature;
(iv) The direction and height of the intended departure.
(d) The frequency assigned is 122.950 MHz and shall be known as 'DEPCOM'.
Don't shoot the messenger
