LONDON (Reuters) – With a string of long distance and cross-country medals to his name and fresh from smashing the half-marathon world record Zersenay Tadese is a hardly a complete dark horse for Sunday’s London marathon.

LONDON (Reuters) – With a string of long distance and cross-country medals to his name and fresh from smashing the half-marathon world record Zersenay Tadese is a hardly a complete dark horse for Sunday’s London marathon.