A RAMPAGING David Warner century has left England in danger of suffering its second humiliating 5-0 whitewash in seven years. The Ashes may change hands as soon as Monday, with England's meltdown in the blazing Perth heat compounded by a right foot injury to Stuart Broad which may rule him out for the remainder of the third Test and the series. Warner smashed 112 in just 140 balls with 17 fours and two sixes as Australia marched to 3-235 at stumps on the third day, an overall lead of 369. It's a sign of the dashing opener's confidence and after play Warner admitted that he had discovered the value of cashing in when you're in form. "Yes, you've got to try and keep rolling that roller coaster and don't let it up and keep batting with intent and that's what I've been doing," Warner said. I know when I get out a few people get disappointed but that's just the way I play. Sometimes it's a bit hit and miss but at the moment I'm in the form of my career. That comes down to hard work and seeing the ball well. I'm growing in maturity now, I'm 27, now, it's here for the taking and you can't take anything for granted. England has managed more than 215 just once batting last in Perth, scoring 350 during the 2006-07 whitewash to lose by 206 runs. Warner was aided and abetted by fried England wicket-keeper Matt Prior, who missed stumping chances off Swann when Warner was 13 and 89. Prior also failed to go for an edge off Chris Rogers when the opener was 26, forcing Alastair Cook to dive towards the keeper, something first slip should not have to do. It was Warner's second century in three Tests. Warner pushed his total in three Tests to 457 at 91 to be the highest run-scorer in the series, with he and Chris Rogers making just their second century opening stand since they began at the top of the order together during the England tour. Rogers was out for 54 caught slapping a ball from Tim Bresnan to point. Warner has been a revelation in this series after struggling in India and England earlier this year, when he averaged in the mid 20s. Missing the first two Tests of the previous Ashes series through suspension after punching England's Joe Root in a Birmingham bar didn't help. Warner sees that as a turning point in his career, and his new relationship with the super fit Candice Falzon has helped him to discover the discipline needed to take his career to the next level. "I've got no excuse when Candice gets up at four o'clock and I'm there by myself in bed," Warner said. I've got to get up and do something. It's helped me massively. It is a lot of discipline and a lot of hard work but credit to her she's stuck by me, she's been fantastic. Broad became Johnson's 19th victim this series in more than one way when the England paceman played back expecting another short ball and was hit on the boot by a yorker as Australia took England's last six wickets for 71 runs. The embarrassment of Broad's tangled dismissal was only the beginning of his problems. He attempted to bowl in the nets before Australia's second innings began after lunch yesterday but struggled. A limping Broad was then bundled into a team car by medical staff and taken to hospital. If he is unable to play any further part in the series it is impossible to see how England can adequately complete. Despite his fearful batting against Australia's pace battery, particularly Johnson, Broad has been the only England player who has looked up for a scrap and it shows in his figures. He has taken 14 wickets at 25 in the series, the only England bowler who has anything like a pass mark. All the batsmen are well below par, with 22-year-old Joe Root having the highest score (87) and best average (33.50). Broad's absence forced England to open the bowling with steady seamer Bresnan, who was playing his first Test since missing the last at the Oval almost four months ago. When Warner slashed a four past Prior bowler and batsman had a stern exchange mid pitch but it was Warner who had the last laugh.