So normal working week is 9-5.30 Mon to Fri however in this line of business we have 12 weeks of peak sales that have to be accommodated (I work in production so have to get these orders made) from Nov to Feb. Last year a 24 hour rota system was put in place and the same is happening this year. I refused to do any evening or night shifts last year which didn't go down well and I want the same this year. This hasn't gone down well with my line manager .am I being aibu