Steph Twell is young, gifted and already a junior champion of the world, just as Radcliffe was as a kid. She is modest, pleasant and as obsessively determined about her running as Paula always has been. Yet while she may at 18 be just about the most exciting track talent in British athletics, having just come home to Twickenham from Poland as the first UK girl to win a middle distance race, the 1500 metres, at the world junior championships, selectors are still making her sweat on her Olympics place.