Many thanks above guys....really good analysis!!
So...if an airline operator says "I need to get a yield of £50 a seat to make it work"...what is he looking for????
Is the £50 AFTER:
1. Government Taxes (APD etc)
2. Airport Taxes & charges (Landing fees etc)
but BEFORE all his own costs e.g. Crew, Fuel etc etc???
Looking at Groundloop reply above....he is 'shortchanging' himself because he should be talking 'Revenue Per Flight' rather than 'Yield Per Pax Per Sector'.