Overnight care

[Katy M]

I have been asked if I will provide overnight care. I have rang Ofsted and asked them if I can register for overnight care and they are in the process of changing my certificate to allow for it.
My question is: what do I charge?
I have asked other childminders in my area and none of them have done overnight care before and suggested lots of different amounts. I thought I might charge a set fee from 7pm till 7 am, but I am not sure what this should be.
Any help would be much appreciated.
Thanks.:)

[MrsP2C]

Not that I've ever been asked but I'm registered for 2 overnight so have included it in my fees & charges as £65 for the first child and £120 for 2 children between the hours of 7pm & 8am (I wouldn't want anyone picking up at 7am to save paying my enhanced hourly rate that applies before 8am :panic:)