Charlie played rugby for London Irish, captaining the side during the 1938/39 season. He also played for the Army Divisional XV (alongside Gordon Douglas Heane Budgen).
His sister, Viola Mary Vivien O'Reilly, married General Sir Miles Dempsey in Dublin, 1948 [The Times, 4 Mar 1948].
He is on the list of those who attended the 23H reunion in 1959.