I took off from Perth a few hours ago, and I’m currently en route to London. I loaded maximum fuel onto my aircraft, which said it was 19.5 hours worth. I’m currently cruising at FL 380 and have over 15hrs left on my flight, but due to strong 50+ kt headwinds. I only have 13.5 hrs fuel left going at this pace. Should I just hope that the winds weaken? What should I do?