Jessica Ennis-Hill is set to make her long-awaited competitive return in the 100m hurdles at the Great CityGames in Manchester on May 9.
The Olympic heptathlon champion will take part in her strongest event after a near two-year absence from competition following the birth of son Reggie last summer.
Ennis-Hill set a British record of 12.54 seconds for the 100m hurdles at London 2012, although that has since been broken by Tiffany Porter.
Double Olympic champion Mo Farah will bid for glory in the 3,000m event at the Olympic Stadium today in the London Diamond League 'Anniversary Games' athletics meeting.
The 30-year-old will compete at 16.32 (BST).
Earlier today, Farah's Team GB gold medal-winning colleague, Jessica Ennis-Hill, finished fourth in the 100m hurdles. She will also compete in the long jump later today.
Jamaican sprinter Usain Bolt is set to contest the 4x100m relay at 16.50 following his victory in the 100m event yesterday.