English star Phoebe Gill has been forced to pull out of next month's Belfast Irish Milers Meet but world-class Canadian athlete Gabriela DeBues-Stafford has been added to the event's entries.
Gill, then aged 17, stunned the athletics world by clocking one minute 57.86 to earn a runaway 800m victory at the Belfast meeting last year - four seconds inside her previous personal best - as she broke the 45-year-old European under-18 record.
The St Albans runner, who went on win the UK Olympic trials before reaching the semi-finals at the Paris Games, was scheduled to run the 1500m in Belfast on 10 May but injury means she will be unable to race at the Mary Peters Track.