From 2003-2014 we appear to have made about $4billion in Hedging. In the same period we spent $325billion in buying fuel. So total hedging profit equates to about 1% of the total fuel bill.
For the period 2011-2014(incl) hedging profits ranged from -2.2% to +4.6% of fuel purchased.
In 2015 the actualised hedging loss was 34.6% of the gross fuel cost.
First half of 2016 the actualised hedging loss was 51.2% of the gross fuel cost.
It's pretty clear they changed their hedging SOPs a couple of years ago and it is not working well!