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
The mother of a former altar boy who tried to blow up a train insisted he was 'a big softie' who didn't want to hurt anyone.
Its current five year licence comes to an end next Tuesday.
Extra armed police will guard major sporting events in London this weekend after the military was drafted in to protect key locations.