Cook bacon in a medium to hot pan until cooked through and crispy. 

Combine eggs and milk in a bowl or jug and gently whisk.  Heat a heavy based, non stick pan until hot. Pour egg mixture into pan and cook until set or to your liking.  Remove pan from the heat and slice cooked omelette into triangles. 

Butter the toasted rolls and fill them with cooked bacon and omelette and top with salt, pepper and other condiments to taste.  Serve while still warm.