Diomed StakesRecordsMost successful horse : All Friends – 1975, 1976 Nayyir – 2002, 2006 Blythe Knight – 2007, 2008 Century Deam - 2018, 2020Leading jockey : Lester Piggott – Sparkler, Averof, Hardgreen, Adonijah Leading trainer : Clive Brittain – Averof, Sylva Honda, Mr Martini Sir Henry Cecil – Ovac, Adonijah, Shining Steel Andrew Balding - Passing Glance, Side Glance, Tullius Sir Michael Stoute - Scottish Reel, Zaaki, Regal Reality Winners