Mary Keitang wins men 's race at London Marathon . Keitany led a Kenyan sweep of the podium places as she defended her London title with a commanding performance . Kipgang finishes over just four seconds clear of former winner Martin Lel . Martin Lel claims women 's title in Kenyan record . 37,000 runners took part in 32nd staging of race .
Mary Keitang wins men 's race at London Marathon . Kipgang finishes over just four seconds clear of former winner Martin Lel . Martin Lel claims women 's title in Kenyan record . 37,000 runners took part in 32nd staging of race .