German rider Büsing won individual eventing bronze at the Helsinki 1952 Olympic Games, and team silver at the same Games alongside Klaus Wagner and Otto Rothe, riding Hubertus.

Büsing was also part of the German team that won team eventing silver at the 1954 European Championships in Basel.

After retiring from riding, Büsing accompanied the German equestrian team to the 1956, 1960 and 1964 Olympics as team vet, trainer and supervisor, becoming affectionately known as Dr Willi.

Büsing was born in March 1921 as the son of a horse dealer in Jade, Germany, and recorded his first international tournament success in 1937, as reported by St Georg.

Büsing was a vet in Jade, was involved in horse breeding and a referee at international tournaments.

Büsing died in his sleep at his parents house in Jade on June 25.

Paying tribute to Büsing the President of the International Association of Equestrian Journalists Jan Tönjes wrote: "One wishes that people of his stature would continue to take up the profession of veterinarian in the future, despite all the inconveniences that it entail.

"A staunch advocate for creatures, an advocate of good riding as the best way to meet the horse sportingly and fairly, has closed his eyes forever.

"Everyone who knew him will feel committed to his credo in dealing with horses."

Prior to his death, Büsing was believed to be the world’s second oldest living Olympic medallist, having been born a couple of months after Hungarian gymnast Ágnes Keleti, who won multiple medals at both the 1952 and 1956 Olympics.