( CNN ) -- Inspirational Joanna Rowsell added another gold to her rapidly growing collection with a classy victory in the individual pursuit at the Commonwealth Games in Glasgow Friday . Rowsell is already the world champion in the discipline and was part of the British trio which won the Olympic team pursuit title at London 2012 . That performance put Rowsell into the global spotlight -- not least because she suffers from alopecia -- a condition that sees sufferers lose their hair . Further success has followed in the team event , which now involves four-strong lineups , but Rowsell has backed that up with her solo efforts over three kilometer distance -- 12 laps of the indoor velodrome . The 25-year-old qualified fastest with a Commonwealth Games record of three minutes 29.038 seconds and beat Australia 's Annette Edmondson by nearly four seconds in the final in the evening session . After her latest triumph , Rowsell said she hoped her success would help raise awareness of her condition . Special triumph . `` I did n't realize before the London Olympics that it ( alopecia ) affected so many people . I was able to bring it to the public eye . I 'd like to do more in the future for people who suffered with it , '' she said . `` I won the world title back in February this year but since then I 've had a bit of a up and down season with illness and injury so I just so glad it has all come together , because you only get this opportunity once every four years . `` It 's very special , '' she added . Edmondson 's brother Alex also had to settle for silver in the final of the men 's 4,000 individual pursuit , beaten by fellow Australian and world record holder Jack Bobridge . England 's Jason Kenny , the reigning Olympic champion , lost out in the final of the men 's sprint to 23-year-old New Zealander Sam Webster , beaten by half a wheel in the deciding race of three . Doping shock . The Games was hit by its first major doping story Friday , with news that Welsh 400m hurdler Rhys Williams had failed a test at the international meeting in Glasgow earlier this month . Williams , a former European champion in the 400m hurdles , denied knowingly taking a banned substance . `` I am utterly devastated about the news of this anti-doping rule violation , which has come as a great shock to me , '' he said in a statement . Williams , 30 , was the co-captain of the Wales track and field team at the Games , but was immediately withdrawn . His teammate , 800m runner Gareth Warburton , pulled out last week after a failed test . `` Welsh Athletics is obviously concerned that this is the second anti-doping violation by a senior Welsh international athlete and will be conducting its own internal review , '' it said in a statement Friday . Proud moment . England 's Benjamin Proud won their first gold in the swimming in the men 's 50m butterfly , beating South African duo Roland Schoeman and 200m Olympic butterfly champion Chad le Clos . The 19-year-old set a new British record of 22.93 in taking gold from the illustrious duo . `` Proud is a talented athlete , '' said the 34-year-old Schoeman . There was an upset in the women 's 100m butterfly as Australia 's Alicia Coutts finished out of the medals in fourth behind Canada 's Katerine Savard , who won gold in 57.40 seconds , a Games record .
Joanna Rowsell wins Commonwealth Games gold in individual pursuit . The British rider won the women's omnium event at Glasgow 2014 and is now aiming to add a second medal of her own on Sunday. 25-year-old Rowsell suffers from alopecia . Welsh athlete Rhys Williams ruled out after positive drugs test .