Got to improve to 50.0 to be world-class. 51.5 is out in the first or second round in the world championships. Especially when elite runners are running 48 seconds nowadays
& Cheriece Hylton, Peri Shakes-Drayton, Jessie Knight, Jodie Williams, Finette Agyapong, Anyika Onuora and Margaret Adeoye...can't all have failed to make the final