Government, authority and airport chargesPer adultPsc (Domestic Head Tax) - AustraliaGBP 4.90Psc (Domestic Head Tax) - AustraliaGBP 10.60Baggage Screening Tax (Safety & Security Charge) - AustraliaGBP 3.10
Total government, authority and airport charges*> More information
GBP 18.60British Airways fees and surchargesPer adultDistribution & Development LevyGBP 9.50
Well according to my e-ticket receipt above it is clearly indicated that this is a BA charge and nothing to do with Qantas.
For reference last year a J class Avios redemption between Hobart and Melbourne (Costing 3 times as many Avios) cost just £18.80 per head in taxes and charges (I no longer have the e-ticket receipt for the full brakdown), this time the redemption total cost was £28.10 per head for a shorter trip in Y rather than J.
It is difficult to believe this is not another quietly introduced miscellaneous charge to bolster BAs profit margins. Certainly no explanation can easily be found on BA.com for exactly what a districbution and development levy is.