Organisers of the Derby 10k have confirmed this year's course was about 400m (1,312. The trust said the course was altered this year due to flood defence work taking place and was required to have an official remeasure by a member of the Association of UK Course Measurers (AUKCM). In a statement, AUKCM said: "Following the Derby 10K on Sunday 15 March 2026, concerns were raised regarding the course distance. "AUKCM carried out a verification measurement on 17 March, which confirmed the course, as run, was approximately 400 metres short. We look forward to welcoming you back to the Derby 10K next year. uk or via WhatsApp on 0808 100 2210.