Asiana didn't upload new seatmap on the webpages (even in Korean website). I think one need to book through internet to see the new seatmap. Nothing special actually, 28-seats means one row is missed (I'll check it later), 32-seats means one row of center part is out (removed for a bar.) All are 2-3-2. Somebody correct me if I'm wrong. I don't know seat numbers, though.

Also, Asiana uses the following lounge in LHR,

DIAMOND CLUB LOUNGE ( Black Phone NBR : 1707 )
Location: Pier 3, near Gate 14.

I'm not sure if this is updated information or this is right terminal, but Asiana website says so.