Matthew Hudson-Smith is a British track and field sprinter who specialises in the 400 metres. He holds, as of August 2023, the British and European record, running a personal best of 44.26 seconds for the distance set at the Budapest World Championships in 2023. He was the 2018 European Champion in 400 metres, and a member of the gold-winning teams in the 4 x 400 metre relay at the 2014 European Athletics Championships, with Great Britain and 2014 Commonwealth Games with England.

The 2017 IAAF World Championships, the sixteenth edition of the IAAF World Championships, were held from 4 to 13 August at London Stadium in London, United Kingdom. London was officially awarded the championships on 11 November 2011.