With one year to go until the Rio Olympics, BBC Sport assesses Team GB's chances of surpassing their record medal tally.
Jack Green and Nigel Levine are added to Great Britain's squad for the World Championships after successful appeals to UK Athletics over their omission.
- Zero tolerance to doping, says IOC
- Rooney wins Worlds omission appeal
- Turner backs tough doping penalties
- Doping claims sadden hurdles champion Child
- Minichiello queries lack of action
- Coe wants 'robust' doping response
- Rudisha suffers first loss in Kenya
- No wrongdoing by Farah - UK Athletics
- Briton Waite fails in Worlds appeal
- Rutherford wins Stockholm long jump
- 'I lost all honour in gender case'
- Wales Bundy-Davies targets Worlds medal
- Ennis-Hill in GB squad for Worlds
- Chand wins appeal over hormone ban
- Disability Sport Hermitage & Hahn improve world marks
- Watch video Asher-Smith makes 100m history
- Farah quizzed over Salazar claims
- Watch video Usain Bolt dances behind BBC's Colin Jackson
Athletics Video & Audio
- Watch video 'I run to inspire my daughter'
- Watch video Proctor sets British long jump record
- Watch video Amos beats Rudisha in men's 800m
- Watch video GB men clinch 4x100m relay victory
- Watch video Bolt wins 100m in 9.87 seconds
- Watch video Farah eases to 3,000m London win
- Watch video Ennis-Hill's 'phenomenal' run
- Watch video Hughes powers to 200m win in London
Best of Bolt
World Athletics Championships
Details of BBC Sport's live television and radio coverage of the World Championships in Beijing from 22-30 August.