So much capacity has been taken out by airlines especially BA and Qantas on the kangaroo route, that dscounts are neither necessary or likely. Last year family of 4 to SYD with stop in SIN in F BA/QF for £11K. This year more than double. This is the real affect of alliances on passengers and fares. The QF /BA alliance may be working for the carriers but the impact on premium cabin fares is clear for all to see. Once BA pitch their fares ex LHR the other carriers all fall in behind as the market clearly supports this fare levels and the seats that are available are being filled.
There will be no deals in the short term but ex Europe fares in some cases on BA., can prove to be much cheaper that a journey starting in London. Stockholm and Budapest are good for this. Check ot Hopwise for latest best prices.