Britain's Niamh Emerson secures world under-20 heptathlon gold as she wins the concluding 800m in driving rain at Tampere's Ratina Stadium ©Getty Images

Britain earned three of the seven golds on offer during the fourth day of the International Association of Athletics Federations World Under-20 Championships in the Finnish city of Tampere.

The victories spanned the events in the Ratina Stadium as Niamh Emerson won the heptathlon, Jake Norris won the men's hammer and the men's 200 metre title went to Jonah Efoloko.  

Emerson, Britain's Commonwealth heptathlon bronze medallist, secured overall victory after winning the event's concluding 800m in pouring rain that had started just before the third and final heat.

Emerson had led since the second event, but defending champion Sarah Lagger of Austria had closed to within just two points of her going into the final discipline.

In 800m terms, it meant that the Austrian had to finish 0.14sec ahead of Emerson to retain her title.

But with the pair having such similar ability - Emerson had the slightly faster personal best and Lagger had the marginally quicker season’s best - neither one had a particularly easy task.

Emerson won in 2min 9.74sec for a winning total of 6,253 points, with Lagger accruing 6,225 after finishing second in 2:11.53.

Poland's Adriana Sulek, third in 2:12.38, took bronze with 5,939.

Having won the individual javelin title on Wednesday (July 11) evening, European Under-20 heptathlon champion Alina Shukh had recorded 14.68 in yesterday's opening 100m hurdles but had then withdrawn from the competition while warming up for the high jump, citing a hamstring injury.

Belgium's Jonathan Sacoor was an assured winner of the 400m gold at the IAAF World Under-20 Championships in Tampere, Finland today ©Getty Images
Belgium's Jonathan Sacoor was an assured winner of the 400m gold at the IAAF World Under-20 Championships in Tampere, Finland today ©Getty Images  

Efoloko won the 200m in a personal best of 20.48, with silver going to compatriot Charles Dobson in 20.57, and bronze being won by Eric Harrison of the United States, who clocked 20.79.

The hammer final was very much Norris' to lose after his two principal rivals - including world under-20 leader Christos Frantzeskakis from Greece - exited in qualifying.

The Briton - coached by BBC commentator and former British international hammer thrower Paul Dickenson - duly delivered in his last major competition throwing with the six kilogram implement, claiming gold with a best of 80.65m, which improved his national under-20 record.

Silver and bronze went to Ukrainians Mykhalo Kokhan, who threw 79.68, and Mykhalo Havryliuk, who managed 77.71.

As expected, the women's 3,000m steeplechase was won by Kenya's phenomenal talent Celliphine Chespol, already second on the all-time list with 8:58.78 - a time she achieved despite losing a shoe on the penultimate lap water jump.

Chespol only needed 9:12.78 to take gold - although that was a Championship record.

Uganda's Peruth Chumtai claimed silver in 9:18.87, with bronze going to Bahrain's Winifred Yavi, who clocked 9:23.47.

Belgum's Jonathan Sacoor took the men's 400m title in a national under-20 record of 45.03, ahead of Jamaicans Christopher Taylor, second in 45.38, and Chantz Sawyers, who took bronze in 45.89.

Zeney Van Der Walt of South Africa won the women's 400m hurdles in 55.34, well clear of Jamaica's silver medallist Shian Salmon, who clocked 56.11, and bronze medallist Yasmin Giger of Switzerland, who finished in 56.98.

Lea Jasmine-Riecke of Germany took the women's long jump title with 6.51m.

Japan’s Ayaka Kora claimed silver with 6.37, one centimetre ahead of US jumper Tara Davis.