Just out of interest, another schedule change on this booking has occured and the connection between DCA-JFK and JFK-LHR is now down to 52 minutes, just 7 minutes above MCT. The schedule change is just less than 2hrs so I don't think I technically have the right to change it. I know T8 very well, and I know that unless the DCA-JFK sector is later than about 30 minutes I should be able to make it (albeit with a mad dash down, under and up). However, I would have preferred more time, for both Chelsea lounge and also so I don't arrive on my JFK-LHR a sweating mess. Will BA have any flexibility? I haven't phoned them yet as I'm still putting together a new itinerary for my outbound, but I want to be armed with as mcuh knowledge as possible.