The postmortem, which was carried out at Rossdales, the leading veterinary practice in Newmarket, concludes that Celebre d’Allen contracted pleuropneumonia after Saturday’s race, while “the subsequent onset of sepsis or endotoxaemia [the release of harmful substances into the bloodstream from bacteria was] likely to have been a key factor in the cause of death”.

Grand National runner Celebre d'Allen dies aged 13 following his collapse at Aintree's final fence on Saturday.

The British Horseracing Authority (BHA) has published Celebre D’Allen’s post-mortem after the gelding passed away. The 13-year-old collapsed after the final fence of the Grand National, with jockey Micheal Nolan being suspended as a result of his ride.