Keely Hodgkinson & Harry Coppell are British champions
She roared home in 1min 59.61 secs ahead of Jemma Reekie (2:00.12), who have both secured their automatic qualification to Tokyo.
He then attempted 5.86m to beat his own British record at the event in Manchester.
Hodgkinson hails from Leigh and is coached by Wigan's Trevor Painter and mentored by Jenny Meadows, herself a former 800m Olympian.
Elsewhere, Wigan Harrier Emily Borthwick was third with a best clearance of 1.86m in the women's high jump - below her recent personal best of 1.93m.