In a textbook demonstration of how to pace the perfect 400m race, Salwa Eid Naser stormed to a memorable gold medal for Bahrain in a world-youth-leading time and lifetime best of 51.50 at the IAAF World Youth Championships, Cali 2015 on Friday (17).Adopting a more cautious approach to the first half of the race than several of her rivals, she made her move at 200 metres and pounced down the home stretch to secure top spot and become Bahrain&rsquo;s first girl to land a world youth title. USA&rsquo;s Lynna Irby, who had started the race more aggressively, had to settle for the silver medal in 51.79. Great Britain&rsquo;s Catherine Reid came through to take the bronze medal in a personal best of 52.25.The heats and semi-finals had thrown up several possible gold medal contenders, but it was the diminutive Irby who took the bull by the horns from the gun and she quickly loomed up on the shoulder of Naser on her immediate outside.Running blind in lane eight, Great Britain&rsquo;s Hannah Williams was also prominent during the first half of the race.At halfway, Irby held a sizeable advantage but as Naser, the 2014 Youth Olympic Games silver medallist, started to make her move, the pair entered the home straight locked side by side. It was not until the final 50 metres when Naser, running in a hijab, started to open a gap on Irby and she went on to secure the cherished prize from her US rival by 0.29.The delighted Reid won the scrap for bronze by 0.19 from Canadian Kyra Constantine, who had been such an impressive semi-final winner. Naser, 17, also became Bahrain&rsquo;s second ever female global champion, following in the footsteps of Maryam Yusuf Jamal, the senior world 1500m champion in 2007 and 2009.The top seven women all set personal best times in what was a high-class final.&nbsp;&nbsp; Steve Landells for the IAAF

In a textbook demonstration of how to pace the perfect 400m race, Salwa Eid Naser stormed to a memorable gold medal for Bahrain in a world-leading time and lifetime best of 51.50 at the IAAF World Youth Championships, Cali 2015 on Friday (17).

Girls' 400m – IAAF World Youth Championships, Cali 2015

Great Britain and Northern Ireland will be represented by 27 athletes at the IAAF World Youth Championships, Cali 2015 in Colombia on 15-19 July.Hannah Brier will be looking to continue her spectacular start to the season after clocking 11.44 at the recent National Junior Championships, making her the fastest youth in Europe this year over 100m.Fellow European youth leaders Catherine Reid and Cameron Tindle have been selected in the girls&rsquo; 400m and boys&rsquo; 200m respectively.Other athletes who will be targeting a place in their respective finals are sprint hurdler Alicia Barrett and triple jumper Naomi Ogbeta&nbsp; along with middle-distance runners Carys McAuley, Alex Yee and James Gormley.&ldquo;We have a really promising team heading to Cali and I&rsquo;m looking forward to seeing how they perform on the world stage in this age group,&rdquo; said team leader Alan Richardson.&ldquo;The athletes selected show potential to be competitive at world level and I am sure they will perform excellently as well as using this championship as a springboard to longer term senior success.&rdquo;British Athletics for the IAAF<h3>British team for Cali 2015</h3>BOYS 100m: Oliver Bromby, Rechmial Miller 200m: Toby Harries, Cameron Tindle 800m: Ben Greenwood 1500m: James Gormley, Markhim Lonsdale 3000m: Alex Yee 2000m steeplechase: William Battershill Pole vault: Joel Leon Benitez Discus: George Evans Hammer: Jake Norris Decathlon: Sam TalbotGIRLS 100m: Hannah Brier 400m: Catherine Reid, Hannah Williams 800m: Carys McAuley 1500m: Harriet Knowles-Jones, Sabrina Sinha 100m hurdles: Alicia Barrett, Hope Sarti High jump: Ada&rsquo;ora Chigbo Long jump: Emily Wright Triple jump: Naomi Ogbeta Javelin: Emma Hamplett Heptathlon: Niamh Emerson, Michelle Hughes

Great Britain and Northern Ireland will be represented by 27 athletes at the IAAF World Youth Championships, Cali 2015 in Colombia on 15-19 July.

Girls' 400m – IAAF World Youth Championships, Cali 2015

British team of 27 set for IAAF World Youth Championships, Cali 2015