Explanation:

Britain won a gold medal recently at the Tokyo Olympics in a mixed 4x100m medley relay event which is a Swimming event. Four British swimmers including male and female both participated in the mixed 4x100m medley relay and they finished first by taking total time duration of  3:37.58s. They set a world record by finishing the event in this time duration. The four swimmers who set this world record are Kathleen Dawson, Adam Peaty, James Guy and Anna Hopkin.