Crap crap crap!
If taking unpaid leave between 17-25 weeks pregnant, you're not eligible for SMP. It is worked out on you earning over the threshold (roughly £120 a week) on average across those weeks.
I'm 21 weeks, and only work part time, so if I left today on unpaid leave, my average will be below the threshold, and I won't be able to get SMP.
Arrgh!
So, I will be in school today, with 6 different classes and a tutor group.
(21 weeks pregnant, asthma, large (1,700 students including 6th Form)
Meanwhile, a friend from another local school, but different MAT, has been told not to come in today, on full pay, not because he is pregnant, but because his wife is, to protect her.