The Kenyan won the 10,000m event at the Zatopek race.
The elite from the "Land Down Under" make final preparations in England.
American Bobby Curtis is a late entry.
In addition, many athletes met the Olympic "A" Standard.
He shattered the course record as well.
It's the first elite field in the 5K's 3-year history.
Top-ranked 5,000m runner Eliud Kipchoge set to attack 13 minute barrier.
The 31-year-old Kenyan ran unchallenged in the second half of the race.