Doing a single booking for three persons (incl. 1 child) prohibits reserving the 3 adjoining seats in row 68A-C or 68H-K as the window seat requires an adult as per emergency exit seat rules. Only circumvention seems to make two bookings (one adult booking and seat reservation for 68A/K and a second one for the other adult and child to reserve 68BC/HJ. Any other way to make a single booking online and arrange for the desired seats? Calling?