Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Great Britain's Jessica Ennis-Hill in action during the Women's 100m Hurdles. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Bahamas' Shaunae Miller celebrates winning the Women's 400m. (Photo by John Sibley/Reuters/Action Images/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Great Britain's Katarina Johnson-Thompson in action during the Women's High Jump. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Great Britain's Morgan Lake during the Women's High Jump. (Photo by John Sibley/Reuters/Action Images/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Great Britain's Katarina Johnson-Thompson reacts during the Women's High Jump. (Photo by John Sibley/Reuters/Action Images/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Great Britain's Morgan Lake during the Women's High Jump. (Photo by John Sibley/Reuters/Action Images/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. France's Renaud Lavillenie celebrates during the Men's Pole Vault. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Poland's Kamila Licwinko reacts during the Women's High Jump. (Photo by John Sibley/Reuters/Action Images/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Poland's Kamila Licwinko reacts during the Women's High Jump. (Photo by John Sibley/Reuters/Action Images/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. USA's Kendra Harrison celebrates after winning the Women's 100m Hurdles final and breaking the World Record. (Photo by John Sibley/Reuters/Action Images/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. USA's Kendra Harrison celebrates after winning the Women's 100m Hurdles final and breaking the World Record. (Photo by John Sibley/Reuters/Action Images/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. USA's Kendra Harrison poses with her time as she celebrates winning the Women's 100m Hurdles final and breaking the World Record. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. USA's Kendra Harrison in action on her way to winning the Women's 100m Hurdles final and breaking the World Record. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. USA's Kendra Harrison celebrates after winning the Women's 100m Hurdles final and breaking the World Record. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 22, 2016. Great Britain's Jessica Ennis-Hill in action during the Women's 100m Hurdles final. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 23, 2016. Canada's Brent Lakatos crashes with athletes during the mens 1500m T54. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 23, 2016. Sweden's Michaela Meijer in action during the women's pole vault. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 23, 2016. Netherlands' Dafne Schippers before the Women's 200m Final. (Photo by Eddie Keogh/Reuters/Livepic)





Britain Athletics, 2016 London Anniversary Games, Queen Elizabeth Olympic Park, Stratford, London on July 23, 2016. Great Britain's Shelayna Oskan-Clarke wins the women's 800m. (Photo by Matthew Childs/Reuters/Action Images/Livepic)