Originally Posted by BAHumbug

Yes this is quite possible.

I would advise that you book this as two 1-way tickets (it won't cost any more). Firstly it means you can do it all online. Secondly it means both tickets are fully flexible.

If you booked a redemption flight as a return it's fully flexible until 24 hours before departure then it's fixed and that's that. By booking as 2 x 1-ways you retain the same t-24 flexibility for the return portion which might come in handy.

BAH