The story of the Grand National horse Celebre d'Allen is a tragic one.

A severe respiratory infection is believed to have contributed to the demise of the 13-year-old horse. After running the grueling jumps race on Saturday, its immune system was severely compromised. The horse collapsed on the course and despite initial optimism about its recovery, its condition deteriorated and it died on Monday. The postmortem findings revealed details about the infection and its role in the horse's death.

The Grand National has long faced concerns about safety, with new measures introduced to make it safer.