Fifth one-day international, Lord's:
Australia 277-7 (50 overs) beat England 235 (46.3 overs) by 42 runs
Ponting will hope Tait is available for the Ashes Test series
Australia won their second match in succession with a 42-run victory at Lord's, but the one-day international series finished 3-2 to England.
They amassed 130 in the final 11 overs to compile 277-7 after opting to bat.
Shaun Marsh smashed three sixes in his 59, sharing 113 in 15 overs with Mike Hussey who hit a superb 79 in 60 balls.
Shaun Tait, who topped 100mph in the first over, took 4-49 and, despite Paul Collingwood's valiant 95, England were bowled out for 235 with 21 balls left.
Stuart Broad picked up two wickets in the final over to claim 4-64 as Australia batted first, as they had done in each of the four previous matches.
But the tourists scored 63 runs in their final six overs to post a challenging total.
The manner of defeat, coupled with Wednesday's 78-run loss at The Oval, will give England something to ponder ahead of a three-match one-day series against Bangladesh, beginning at Trent Bridge on Thursday.
How much significant Australia's two wins in London will be ahead of the Ashes Tests, which start in Brisbane on 25 November, remains to be seen.
But Australia skipper Ricky Ponting will surely be trying everything to persuade Tait to reverse his decision not to play Test cricket because of regular injury concerns.
The 27-year-old South Australian allied swing to his express pace to strike twice in the fifth over.
First he breached the defences of Andrew Strauss to send his off-stump spiralling out of the ground.
England were struggling after Strauss fell to Tait in the fifth over
Kevin Pietersen was not permitted to bat at three having sustained a thigh injury whilst fielding, but England surprisingly opted to send Michael Yardy in first wicket down.
The left-hander was bewildered by the pace of Tait and offered no stroke, the ball cannoning off his pad onto the stumps.
Craig Kieswetter was soon on his way too, smartly caught by Hussey at short cover off a leading edge, leaving Collingwood and Eoin Morgan, at the crease in the eighth over with 234 runs still required.
Morgan was dismissed in the 16th over by Marsh, juggling as he dived close to the mid-wicket boundary, and Kevin Pietersen, played on to leg-spinner Steve Smith via an inside edge.
Luke Wright (21) and Tim Bresnan (34) formed better stands with Collingwood, who reached his 26th ODI fifty by hooking Tait for six, to keep England within reach of an improbable victory.
After 39 overs, the hosts were 37 runs ahead of Australia at the equivalent point and 85 were needed from the final 60 balls, but they inexplicably chose not to take the batting powerplay at that point.
The match took another decisive twist when Ponting turned and threw down the stumps from cover to leave Bresnan a yard short in search of quick single, and in the same over Tait uprooted Collingwood's leg-stump via an inside edge.
Graeme Swann hit some innovative strokes and took three fours in an over from Ryan Harris but his cameo ended on 33 when he lofted to mid-off to give Australia victory.
The Australia innings was a complete contrast to England's with a quiet start against some accurate seam bowling.
Only 31 came from the compulsory opening 10 powerplay overs, with Broad striking in his first over for the second time in the series as Shane Watson pulled to mid-on.
Ponting struck some sumptuous boundaries but was dismissed for 15 when he was tucked up attempting to pull a Broad bouncer and the ball looped off the glove to Kieswetter.
Tim Paine recorded his fifth ODI fifty and the team 100 with a deft late cut for four from the first ball of the 27th over but by modern international standards his innings seemed rather ponderous.
Then the attacking spin of Swann, dovetailing nicely with the containing flat deliveries of Yardy, claimed two wickets in his first two overs.
With the innings rather meandering 147-4 after 39 overs, the Australians decided to take the batting powerplay, and England opted to take Swann out of the attack.
However, the next three overs of pace from Broad and Anderson saw 42 scored, with Marsh pulling Broad for a mighty flat six and adding a glorious straight drive into the sightscreen for six more.
Marsh took just 45 balls to reach his seventh one-day fifty and recorded the Australia 200 simultaneously as England began to look raggedy for the first time, Marsh helping himself to a third six by dispatching a low full toss from Anderson over mid-wicket.
He lofted Swann to deep extra cover in the 45th over but Hussey calmly recorded his 31st ODI half century, his first in eight games, and recovered from a broken bat to hook a full toss from Bresnan for six, finally caught on the boundary in the final over.