Subject might be misleading but struggled to think of a snappy title!
I currently work part time (12:30-17:30). I was asked if I'd be prepared to take on more hours doing a different role while they're trying to find someone permanent. It would only be for about a month. I said yes and that I could do 09:30-12:30 in the other role. I viewed this as going full-time (09:30-17:30).
My manager has asked if I could do 09:30-11:30 instead because I'll need a break and I could go home before coming back in for my usual 12:30. This has really irritated me. Everyone working full-time gets paid for their lunch break and this seems like a way of trying to get out of paying me for that time. Also, everyone working over lunch time gets a free meal at work (I work in a school).
I'm not sure how to respond to the manager. I was agreeing to the extra hours because I could see they were in a fix but now I feel like a mug.
I suppose this is an AIBU and if I'm not then how do I respond to the manager?