Google is telling me that £24 (pounds not Euros) is currently around HK$348 though, so it's gonna hurt either way. That's what you get for waiting around.
That said, the GBP is currently falling again, so it could be a lot cheaper for you by Xmas.
Sorry, an S2 license will always cost £24. These exchange rates are unfortunate, but the devs cannot adjust the price for specific countries. Maybe you can find someone generous to buy you a license or parts of it, but the devs won't and can't make you a special offer.