Originally Posted by
lighting
Hadn't even noticed the vouchers are different
My Amex card is black
BA American Express Companion Voucher - Issued 18/6/21 - Expires 18/12/23
BA American Express Premium Plus Companion Voucher - Issued 11/8/22 - Expires 11/8/24
Thanks.
The one expiring 2023 can probably be disregarded, as it will expire before your desired travel date. Even if you changed your travel date to before it expired, it can't be combined into the same booking as the other one - only vouchers of the exact same type can be combined,
The one expiring 2024 is one of the new style Premium Plus ones - these are the most flexible ones, as they open up extra availability in Business (Club World) class, and can be used in any class.
I'll try compose a longer reply later, but others will have some suggestions knowing the voucher type(s).