Originally Posted by
ENTP
Connecting flights into LH tend to book into high buckets to ensure availability. (Typically) K for WT I think and Y for WT+. J for CW/F.
They have recently lowered them a bit for connections to/from WTP. It used to be Y on BA but is now K, and on AA domestic in the USA it was B but that is now H, so both ends now earn fewer avios and TPs than before.