The cast of Bulldog Drummond Comes Back included an English actor who as also an amateur champion of what sport?
Bulldog Drummond Comes Back:  The picture was directed by Louis King and the supporting cast includes series regular Louise Campbell, Reginald Denny, E.E. Clive, and J. Carrol Naish. Reginald Denny (actor): Reginald Denny (born Reginald Leigh Dugmore, 20 November 1891 – 16 June 1967) was an English stage, film and television actor as well as an aviator and UAV pioneer. Reginald Denny (actor):  He was once an amateur boxing champion of Great Britain.
boxing