Having been an 'Angel Flight' volunteer pilot, The use of 'Angel Flight' when first contacting ATC, along with your normal aircraft callsign, is to alert ATC AND the Aerodrome operator, that this is a 'no charge' flight.
That is, 'Angel Flight' has an arrangement with ATC that no ATC charges will be levied on this flight. Therefore the 'Flight Progress Strips', or their current equivalent, will be marked accordingly.
The SAME arrangement usually applies to the aerodrome operators
Its a donated ATC & Aerodrome Operator 'freebee'.........
CHEERS....And....THANKYOU TO ATC, and to the AERODROME OPERATORS.
Last edited by Ex FSO GRIFFO; 28th Jul 2021 at 13:31.