Hello hoping someone can help. I need a day off at work in June but unfortunately the holidays are full on that particular day. My manager said if I can get somebody to cover me and I would do their shift. I only work 5.5 hours a day and the lady I am swapping with work 8 hours a day. My manager said if we do swop shifts I would not be paid in the difference in hours. Are the allowed to do this?? Thank you .