Kipchoge had no answer as a seven-strong lead group edged away from him, and he ended up finishing down in eighth.
The 26-year-old Kosgei world record holder comfortably won her duel with fellow Kenyan Ruth Chepngetich.
Twell and Lily Partridge are two of the British women hoping to build on Paula Radcliffe’s achievements in the race.
Bekele has a calf problem.
The West African Diack served as president of athletics’ world federation between 1999 and 2015.
The 87-year-old, Diack who was the figurehead of track and field from 1999 to 2015, faces five charges related to an alleged cover-up of drugs tests for Russian athletes in return for bribes.
Four-time Olympic gold medallist Sir Mo Farah swept to victory during a road race on Northern Ireland’s scenic coastline.
The South African is a double Olympic and triple world 800 metres champion.
The two DL meetings this year in London and Gateshead were cancelled due to the coronavirus pandemic.