Singapore lounges were being refurbished, so things were a bit of a mess, then QF fell out with BA in what I predict will end up a disastrous move. As Singapore isn't a OW hub, the lounge situation is rather dire compared with Tokyo, Hong Kong, Sydney, or I guess KL.

BA have 3 departures a day from Singapore, same as from IAD, and IAD does a seperate F lounge. On the other hand, I prefer SIN's current lounge to IAD's Flounge.