I'm sure it must have been asked before but I can't find regional info on a search. This will be a friend who will be looking after my 6 mo DS at my house, for an hour or two during the day. At the moment it's one-off arrangements but I am thinking of asking her if she can do one afternoon a week to give me a break.
I work as a nanny in Manchester and for babysitting earn £8 hour before midnight and £10 after and most people seem happy with this. I am NNEB qualified and 16 years of experience to ask for this though, maybe if your friend not as expeienced would be £1-2 hour less.