Originally Posted by
A406toHeathrow
I won't be able to know that in advance though will I? Surely that must be uncommon or only in event of an aircraft going tech on that route?
If you do a dummy CW or WTP+ booking, you would be able to tell if it's a mid-J jumbo. Obviously that's no protection against a last-minute equipment change, but it's a helpful guide. I do think mid-J are rare enough on LHR-JFK though.