Hello!

Here you are:

A – Discount First
B – Semi-Flexible Economy
C – Discount Club
D – Discount Club
E – Discount World Traveller Plus
F – Full Fare First
G - Groups
H – Semi-Flexible Economy
I – Discount Club
J – Full Fare Club
K – Discount Economy
L – Discount Economy
M – Discount Economy
N – Discount Economy
O – Discount Economy
P – World Traveller Plus Redemptions
Q – Discount Economy
R – Discount Club (used to be Concorde!)
S – Discount Economy
T – Discount World Traveller Plus
U – Club Redemptions
V – Discount Economy
W – Full Fare World Traveller Plus
X – Economy Redemption
Y – Full Fare Economy
Z – First Redemptions

Is is buried in the BA Ultimate Guide somewhere too...

Regards,

BBB