Originally Posted by graraps
why don't you just buy a priority pass or Qantas Club (BA lounge access)- or, if you are really desperate, Servisair- membership instead of worrying about how to earn the dwindling benefits of BD silver?
There is no PP lounge in LHR T1 Domestic.
I think that it is slighty unfair to suggest that the benefits of BD silver are "dwindling" by the way -- seems to me that they're not changing at all. Gold card members may lose the voucher upgrades (or, indeed, they may be improved), but I don't see any other major changes to the diamond club package.
ETA: On the other hand, if the OP flies BA instead, Qantas Club membership would be a great substitute.