These houses had recently been bought en bloc by a property developer who was about to have them renovated.
-- Ruth Rendell, End in Tears, 2005
Mr Gates, after a pause, agreed to act as chairman temporarily, and Anton sat down, with a look of satisfaction which explained to Martha that she had under-estimated the danger of the entire body of respectable patrons resigning en bloc.
-- Doris Lessing, A Ripple From the Storm, 1958
En bloc entered English in the mid-1800s directly from the French phrase of the same spelling and meaning.