Even Cheaper Fights

[Blue and white stripes]

Just booked return flights for January, priced at £17 each way. However because I may want to change one I booked them separately, £17 and 17€. Ryanair offered me a guaranteed exchange of £15.42 for the 17€ return flight. Just checked my statement £14.27 (no fees payable) a saving of 19%.
Return flights, Ryanair £31.27, Jet2 £63 for the same dates. That's why I use Ryanair.