A question for this thread please as a newbie which there doesn't seem a clear answer (different experiences) when I searched:

1) Can I book using a joker and my wife's companion voucher if she is travelling with me?

2) If 1) doesn't work, can I use the joker now, and then get the GGL line to apply a companion voucher to the booking later to get 1/2 the avios back?

Thanks in advance