Athletes needed to achieve a top-two finish, and have met the World Athletics entry standard, to be assured of a place in the squad, to be announced on 27 August.
Olympic 1500m medallist Georgia Hunter Bell won the 800m final to secure a spot in Tokyo, where she could face training partner and Olympic champion Keely Hodgkinson.
Max Burgin claimed a dominant win in the men’s 800m, while title favourites Charlie Dobson and Amber Anning earned 400m golds.
World 1500m champion Josh Kerr, already assured of a place in the squad in that event, had time to wave to the crowd in the closing stages of a comfortable 5,000m win.
High jumper Morgan Lake and long jumper Jazmin Sawyers were among the other athletes to secure their places for Tokyo on the final day of action.
More to follow.
