Situation - flying back from Israel First Class on award (including 2-4-1). May 30-TLV to LHR. May 31-LHR to JFK. It would be very helpful if I could change to the 29th. It would require downgrading the first leg to Business Class and then taking a later flight to JFK so I could make the trip in one day. BA shows no availability - yet the airline seat maps show the cabins are wide, wide open. So two questions - do they open closer to departure and, if so, when? And as the title states - can a human check it out and make the change if it makes sense and doesn't hurt the airline? Thanks.