Buttler sees England home with 28-ball fifty
Openers Roy & Bairstow put on 174 inside 24 overs
Roy out for 101 off 81 balls; Bairstow makes 79 off 66
Australia 310-8: Marsh 101, Finch 100, Head 63
Willey takes four late wickets as Australia collapse from 256-3
England - 3-0 up in series - looking for whitewash
#bbccricket
Rob Meech: I hope the Australian newspapers that mocked England’s cricketers after their defeat to Scotland are feeling suitably embarrassed now. 4-0 up with one to play, I smell a whitewash.
England finish on 314-4 with Jos Buttler unbeaten on 54, with Alex Hales more watchful in his 34 not out.
Both ensured there was no wobble after the dismissals of Joe Root (27) and Eoin Morgan (15).
But the real foundation of this run chases was a glorious opening stand of 174 between Jason Roy and Jonny Bairstow.
Roy played an immaculate innings to bring up his second century of the series before falling for 101, with Bairstow similarly sublime in making 79.
That is England's second-highest successful run chase in ODI history, surpassing the 309-4 they hit to beat Sri Lanka at The Oval in 2016.
The highest was 350-3 against New Zealand at Trent Bridge in 2015.
You fancy they'd have beaten that mark too today if they'd had to.
Graeme Swann
Ex-England spinner on BBC Test Match Special
On Tuesday we saw that there is no total England can't set. Today we've seen that there's no total they can't chase.
Daniel Norcross
BBC Test Match Special
What a magnificent way to end this match. England have obliterated Australia.
And that - emphatically - is that.
Jos Buttler flicks his wrists and carves the ball away through the covers for four to wrap up a dominant six-wicket victory for England.
Eoin Morgan's side go 4-0 up in the series and will look to close out the whitewash at Old Trafford on Sunday.
Eng 310-4
Haha. Jos Buttler sends the ball straight up in the air, it's caught but it's a free hit so he scampers two to level the scores.
That's a superb fifty from the England keeper too.
Oh dearie me.
Michael Neser makes an absolute mess of an attempted slower ball, looping it up over waist height and Jos Buttler marmalises it into the stands.
That's a no ball and a free hit next up.
Need 10 off 35 balls
Michael Neser sends down a low full toss and Jos Buttler drills it through the covers for four - 300 up for England.
Graeme Swann
Ex-England spinner on BBC Test Match Special
The most remarkable thing is that Australia have posted 310 and it will be a humdrum game. England haven't had to get out of second gear.
Hales 34, Buttler 38
Nathan Lyon returns and just calms everything down with a tight over - only a single and a bye from it.
Need 17 from 42 balls
England surging to victory here. Michael Neser offers a bit of width and Alex Hales frees his hands, placing a square drive through the gap four four.
How do you bowl to Jos Buttler?
Michael Neser sends down a wide yorker but the England keeper shows his trademark fast hands to swipe it square for four.
Next ball, he stands tall and smashes a lofted drive over the covers for another boundary.
Adam Gilchrist
Former Australia wicketkeeper on TMS
Buttler had to shovel that out with his bottom hand. It wasn't that far from being a yorker. He stood still and dug it out.
Target 311
Billy Stanlake zips one through and onto Alex Hales' pads but that was too high for lbw.
Hales does get off strike as he chops one down and briefly hesitates but Jos Buttler calls him through. Good running.
Oh that is delicious. Buttler unfurls that punchy drive, expertly threading it between extra cover and mid-off for four.
Adam Gilchrist
Former Australia wicketkeeper on TMS
It's a depleted Australian line-up, this is about fact-finding and learning. There have been plenty of pressure points in this series. They have shown a willingness to stay competitive.
Hales 27, Buttler 24
Ashton Agar has indeed bowled well but Tim Paine turns back to Jhye Richardson.
Ah, that's too short and straight and Jos Buttler marmalises a pull stroke away for four.
Jeez. Make that back-to-back fours, a bit of width and Buttler slashes it hard through backward point.
Whack! Make that three from the over - another short ball and this time Buttler dismisses it with a short-arm pull through mid-wicket for four more.
Adam Gilchrist
Former Australia wicketkeeper on TMS
Australia haven't given up. Ashton Agar has been terrific.
Hales 26, Buttler 11
Jos Buttler chips a little loosely over the covers but gets away with it to pick up two.
A couple of nice drives locate the man out in the deep as England keep the scoreboard ticking. Six runs from the over.
England need 51 runs for victory from the final 10 overs.
Jonathan Agnew
BBC cricket correspondent on Test Match Special
I think we'll see big Billy Stanlake roaring in for the first Test at the Gabba the next time we're down under.
Image source, Rex Features