12.30pm: Well, that escalated quickly. England were seemingly still well placed this morning, despite their mini-collapse on the second evening - but this was a full Bazblowout, six wickets shipped for the addition of 47 runs in an hour and a half's play. Ben Stokes fell to the second ball of the day, and Mitchell Starc added another when Harry Brook was finally suckered by the bumper ploy. That left Jonny Bairstow as England's best hope of getting close on first innings, but he holed out straight after drinks and the tail disappeared in a flash. England behind the 8-ball here, although they'll doubtless back themselves in a fourth-innings chase (particularly with Lyon out of the equation). Australia batting again in 10

Pat Cummins brings himself back on with one needed

England have gone down in a heap this morning, a collapse of 5 for 46. Out comes James Anderson at No. 11

Josh Tongue is the next lemming batter to the crease

In fact, I think that has just missed the helmet grille and struck Broad on the jawbone. Robinson comes down, and the Australians go to check on him as well. The England medic is quickly out to have a look... seems like he has passed the concussion test, Broad is nodding his head that he's okay to continue, despite the ringing in his ears. He really took that right in the chops

"I doubt we'll get beyond 393/8 as the turning point in the series," murmurs David, with his arms crossed

Green replaces Hazlewood. New ball is six overs away

"Slowly, but surely, England are throwing this game (and probably the Ashes) away," sighs richyrandall. "Like you've said, I bet Australia cant believe their luck! Really poor cricket from England. "

"Move fast and break things, suits Space X more than Bazball. Sorry, that's move very fast and spontaneously rapidly deconstruct things isn't it." They're looking broadly similar atm, Julian