How is it that one Dublin school, Blackrock College, are the kingmakers of Irish rugby?

Blackrock College in Dublin. Photo: Brian Lawless/PA

John Joseph Clarke

Why do so many Blackrock College players go on to represent Ireland? How are they coached? And what's their culture like?

Blackrock College have won 70 Leinster Senior Cups. Belvedere College is second with 12, not even close.