Nowadays Rafair (ICAO RFR) tends to be used by fast jets, helicopters, Tucanos, etc while Ascot (ICAO RRR) will typically be a 146, Voyager, A400M, C17, etc.
Some present-day callsigns that spring to mind include China Airlines "Dynasty", Virgin America "Redwood", AirAsia X "Xanadu", Jetstar Japan "Orange Liner".