Well, I started this thread, and now Thomas Cook have emailed me again to say that flights are changing again! Don't believe it. I paid £70 to change the original flight but did get an additional night in the hotel so thought all's well that ends well. Huh!! They're now offering me a night less but better flight times, ie not arriving silly o'clock in the morning either end. BUT, I've a mind to say stuff it and cancel as there's no guarantee that they won't change times again as its a long time yet to September. Might sleep on it (insert unhappy face!)