Former drugs cheat Dwain Chambers has won his 100m heat in a season's best time of 10.02 seconds - faster than Usain Bolt's qualifying time.
The crowd greeted his appearance with a huge roar of approval.
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In her message Theresa May praised the "inspirational bravery" and "unbreakable spirit" of Mancunians in the wake of the blast.
ITV News has obtained exclusive footage of the moment armed police raided a house believed to be linked to the Manchester suicide bomber.
The Manchester Evening News set up a JustGiving page asking people to support the families of those affected by the suicide bombing.