Hi - When I come to book using 2 for 1 vouchers, I will want to book 4 seats with 2 vouchers. However one voucher is on my account and the second is on my wife's.

There doesn't appear to be a way to do this online (which makes sense as they are different accounts) but is it possible to do this via the phone? I know we could risk making bookings at the same time and hoping for availability (when you search a booking are the flights held for any amount of time or only only when you confirm payment?). Or any other suggestions would be gratefully received.

Thanks!