Most successful trainer in the Diomed Stakes?

Question

Clive Brittain – Averof (1974), Sylva Honda (1991), Mr Martini (1995) and Henry Cecil – Ovac (1978), Adonijah (1984), Shining Steel (1989) have both won the race three times.

Answer 1

Lester Piggott won the race four times on  Sparkler (1971), Averof (1974), Hardgreen (1980), Adonijah (1984)