On my one (yes, I bought only one) itinerary, we're booked in 21 on the outbound, but have no seat assignments on the return. According to the seat map, it is in the 2-4-2 configuration (on a 747), which indicates that it's in WT+.
Mike
(edited 'cause BA.com told me I was wrong the first time.)
[This message has been edited by nako (edited 11-30-2002).]