I served my apprenticeship for a ship repair firm on the Liverpool docks with Catholics and Protestants who, for 364 days of the year were the best of friends, except for 'The Glorious Twelfth', when they fought like cat and dog.
The only exception to the unity was when work was slack; then you could only get a job at Brown's if you were a Catholic or Cammel Laird's if you were a Protestant.
Funny thing religion!
Jim Carroll