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14 August 2015, 09:35 | Updated: 14 August 2015, 09:38
Milton Keynes-born Olympic athlete Greg Rutherford has criticised the World Championships kit - for not having a Union Jack on.
The champion long jumper took to Twitter to complain:
A hasten to add I'm yet to find an athlete who wanted the change. EVERY athlete I've spoken to wants the union flag— Greg Rutherford (@GregJRutherford) August 13, 2015
Other athletes have also criticised the kit.
Dame Kelly Holmes says the Union Jack is "iconic" and David Weir OBE said athletes "put on the kit for the flag".