She had no idea that that time will again come out to benefit her with an Olympic berth a year on. No other Kenyan apart from Jelimo, Sum and Jepkosgei has run faster.
However, Sum, who also made a debut at the world championships last year, has moved up the cadre and clinched a slot in the 1,500m distance thus leaving the position vacant.
Winnie Chebet clocked 2:00.33 at the trials, a personal best, but will have to wait for another chance to confirm her place in the Kenya team.
She won gold at the World Youth in 2004, picked a silver at the junior level in Beijing in 2006 and was fifth in her last show at the World Junior level in Bydgoszcz, Poland in 2008.
World and Commonwealth champion Dai Greene is to captain the Team GB Olympic athletics team in London, adds BBC Online.
The 26-year-old will skipper the 78-strong team for the second time having held the position for the European Team Championships in Sweden in 2011.
Greene is one of Team GB’s medal hopes with long-distance runner Mo Farah who won 5000m in Daegu, heptathlete Jessica Ennis and defending 400m champion Christine Ohuruogu.