Aviance only handle more flights than Servisair because Air Wales were forced to sign to Aviance by BMI Baby
Cardiff isn't really big enough for two handling agents. Just the one will work perfectly (see BRS). Unfortunatly for Aviance, Servisair handle the summer "major players" like BY, VZ, JK, TY, KM, Z4, FHY, FR, 8Q. Servisair also have cargo facilities and with Airway Handling they dominate ramp operations. An Aviance handled aircraft can't be turned around without some input from Servisair.