Not sure if this has been mentioned before but BA have a sale on til tomorrow lunchtime in conjunction with the ashes.
They are deducting Englands highest innings total from the Adelaide test in dollars which was a massive 620
I booked today a return flight and got $620 off the price and so paid $1440 in total. I just checked and there are still seats available if anyone is looking to go back from Feb next year.
You need to go on the Aus site of BA and make sure you are booking a return flight from Adelaide to London.
Hope that helps someone