I have loyaly enough points to be eligible for a return journey on the East Coast network. Now, I want to make use of this to visit a friend in London (I live in Leeds). I want to be able to see on what days there is availablilty for me to use these free tickets, and then me to relay this to my friend to see which works best for him. But he might not be able to give me an answer straight away, what with work and any other various commitments he may have. So my question is, if I try to redeem the free return ticket now to see the availability, will I have to purchase the ticket at the same time? Because this isn't an option for me. I'm worried that if I don't purchase it straight away I will lost the free tickets!