"[1] Many other prominent athletes have also adopted the 5-pace system of training including Saïd Aouita who was the only man at the time capable of running 800m in sub 1:44, 1500m in sub 3:30, 3000m in sub 7:30, 5000m in sub 13:00, and 10000m in sub 27:30 and Noah Ngeny, the 2000 Sydney Olympic 1,500m champion.
Horwill was widely respected in athletics circles throughout the world and lectured and coached internationally, including in Canada, Ireland, Poland, Zimbabwe, Kenya, Bahrain, Portugal and South Africa.
The latter country held a special affection in his heart and on his frequent visits he was sought out for advice by aspiring South African middle distance athletes and coaches.
A prolific writer, Horwill regularly produced articles for the British magazine Athletics Weekly, and other sporting publications.
Horwill was appointed Member of the Order of the British Empire (MBE) in the 2011 Birthday Honours for voluntary service to sport.