Whakaotihia te rerenga e whai ake nei: E tekau ma rua nga putanga i te IAAF World Cross Country Championships mai i te 1977 ki te 1995. I takitahi, i puta tana mahi i te
1983 IAAF World Cross Country Championships, i te wahi i noho ai ia i te tuawhitu o te katoa. Ko Clarke te toa hiriwa e toru nga wa i te whakataetae (1982, 1987, 1989) me te wikitoria i te parahi a te roopu i te 1992, e tohatoha ana i nga honore me Mike McLeod, Hugh Jones, Julian Goater, Steve Kenyon, Karl Harrison, Carl Thackery, Kevin Forster, Steve Binns, Tim Hutchings, Gary Staines, Richard Nerurkar, me Eamonn Martin, me etahi atu.