Thank you, guv1976 and rbAA. Great information, and I will keep reviewing and absorbing. Two more questions:

1. Is it acceptable manners to ask the BA flight attendants to let us deplane first? This would be on the flight arriving from Dubrovnik.

2. If we miss the LHR connection, are we allowed to enter any of the One World lounges (Qantas, Cathay, AA) before we leave the airport? They typically have Kosher frozen meals.

Thanks again.