It is a real blow for any athlete to miss out on a major championships through injury, but to have fought so hard to regain full fitness and to have to take such a difficult decision at this stage is particularly hard.
We wish Mo all the very best and hope to see him back to his peak very soon
More top news
A bungling robber who left his phone at crime scene has been jailed for more than three years.
Four police officers set to face misconduct hearings after a Jury in the Henry Hicks inquest returned a narrative verdict.
A British passport spoof 'have to take safety precautions when leaving house' video has hit 650,000 views on Facebook.