Work in a NHS clinic. A patient appeared at 10.30 for a 14.30 appointment demanding to be seen. Now, this clinic is quite specialised. Each patient has a half hour appointment.
So, I said to early patient we would see her, but it would be at the end of clinic (for which I would not be paid the extra half hour as I work half days, ending at 12.30pm, and my NHS trust has stopped overtime/time owing).
So, I ended up working an extra half hour for no pay because someone believes the world revolves around her.
So AIBU to have expected her to phone and ask if she could come early before doing so.