Originally Posted by
KARFA
It has to be put under the same booking ref for the 2-4-1 to apply across it though.
EDIT: to add, by all means try it, but I would be very surprised if you have two separate one way bookings with separate PNRs with one 2-4-1 applied across both, that would seem to be against the terms of the voucher.
Are you saying that having read
cbagent's wiki-bit:
"the itinerary will be ticketed as two one way bookings".