An apology at the start as I think I've seen this answered before, but can't locate it. 2-4-1 Voucher issued today with 12 month validity. When seats become available at T-355, I will book the outbound journey for 1 Sep 20 and then phone 10 days later to book the return journey. I know that the return journey is allowed to take place after the voucher expires, but will I encounter any problems as I will be booking this separately to the in-date outbound journey? I'm sure the plan is OK, but there are a lot of moving parts to this trip so just want to make sure! Thanks in advance.