The honour of being the first athlete from the Olympic Trials to seal their place at London 2012 fell to Sophie Hitchon in the women's hammer.
Hitchon, 20, had already achieved the 'A' standard of 71.50m and therefore needed to finish in the top two here to make certain of being in London, something she achieved comfortably with victory and a best throw of 69.79m.
A delighted Hitchon, who won the world junior title in 2010, said: "I'm really excited. I can't really believe it yet.
"I've been throwing really well in training and just wanted to come here and finish first or second and now I'm on the team."
Jessica Ennis had earlier won the high jump title with an outdoor season's best of 1.89m, with the Sheffield athlete then going on to qualify impressively for Saturday evening's final of the 100m hurdles.