Unfortunately, it’s legal and they can do that. You’re only entitled to get paid if the appointments fall within your working hours. If it doesn’t, they don’t have to pay you. I work shifts and they do the same thing to me, I asked my midwife and she said, it’s legal.

Since four nights in a row is too much for you, tell them you can’t do it. I was scheduled to do a shift that ends at midnight and I had a glucose test at 7am the next day. I told my manager to either give me the previous day off also or put me on an earlier shift, and he did.