Originally Posted by
lorcancoyle
F to J probably attracts the same taxes and airport fees, so no cash due on that portion, but I don't think that the BA imposed fees can be treated as a tax. But that's maybe £300-400 return, so 75% of one way isn't much. If the difference in Avios is being provided I'd agree it's probably best to take the cash and Avios difference.
There was a recent MCOL judgment (so not binding) that ruled that it was 75% of the segment cost and not the entire ticket and that the taxes (so APD / departure taxes and airport fees)were NOT included in the calculation and it appears that this includes the surcharge (which of course is not a tax but I bet the lawyers for the airline kept quiet about that distinction)