This year, we were told we have to do a lunch duty once a week - this is for half an hour of the lunch hour. Some teachers, including myself, have to do a break duty on the same day. During the remaining half of the lunch hour, it takes me about 20 mins to get ready for the afternoon, leaving me 10 mins to eat, drink and use the loo. Are we meant to do lunch duty? Is there a minimum break that we should be getting? Thanks!