More very useful info, thanks all. I found the comment regarding brexit particularly worth considering. I'm no expert though! From all of the poking around I've done - and I've exhausted it - ,going through Athens or any other connection I've found, is 3,200-5k more compared to LHR and even if I missed and would have to buy another set of tickets to CFU, I'd still be way ahead. I would love to go through Athens for a few reasons but the extra hassle of not technically "connecting" or a less optimal airport may be worth it. Still deciding but thanks to your input, I have more to go by. Cheers