I had a letter in the post saying that I have now been awarded one of these upgrade vouchers. My first thought was "Did I spend so much on that card?" Anyway, apparently the voucher has been lying in my Avios account for over a month now. I hardly ever login to that account. Why can't they just send me an email to notify me? Rant over.

As I understand it, if I want to use this voucher, I need to look for Avios availability in both classes of travel. So if I wanted to upgrade WT+ to CW, there needs to be Avios availability in both the classes on the same flight. Can someone confirm this please? Is there a way to upgrade cash bookings with this voucher?
Looks like the voucher can be used on a return tickets or two one-way journeys which is some sort of consolation I guess provided one does find availability.

Also, the voucher is valid only for a year and I didn't even know about its existence for over a month! Grumble grumble.