Quite a few CM's are registered for overnight care myself included (Kent) but this would mean going to their house. If you want someone in your own home an AP would be best & definitely work out cheaper if it's more than 2 nights a week.
Advertise locally. When my father needed someone staying at night people were available to do that for a fee. May be they could even just sleep in your bed if space is a problem rather than having to be up all night and then it might be cheaper. We are in one of the worst recessions for years. there are always people for hire to do anything at the moment. They would be fighting over the job. Obviously take up references.
yes i argee with xenia try and and get a sleep in childcare pay them flat rate and hourly rate more if they have to get up in night if your child is sick . if you get au pair they will around in day when you are trying to sleep. i know i would do job like this and sure other people would
if you have room you could also try a lodger who works 9 - 5 and wants a cheap room depending on what time you get home and time of school run.
have a look on gumtree / mumnet at people offering to be babysitter and ask them how much they would charge .to do a sleep in. if you go this route have few on them so they can cover sickness holidays ect
I know two CM in my village that do overnight care (so it isn't that uncommon) they charge about £25 / night for over 2's. I am based in S Yorks - so not an expensive area. Contact your Family Information Service for a list of CM close to you who provide overnight care.
I've been looking at about £70 a week for 25 hours work for an au pair - plus of course food and board. Au pairs get "pocket money" rather than a wage, and actually if your job leaves the day free then it would be perfect for an au pair who wants to study in the day. Do you live near a university? Might be perfect for someone who wants to come to the UK to do a degree.
I have a friend who is also a LP, and worked as a nurse on night shifts during the week.
(our DSs are now late teens/early twenties).
What she did was advertise at the uni for a student (she had a spare room) to live there during the week so she would have someone for her son in the evenings and during the night. She would come off her shift, do the school run and go to bed until 3 or 4 pm.
She had about 3 different girls over about 8 years, it worked out pretty well. She became friends with all of them.
She charged a low rent and had the clause that they went home at the w/e (parents, boyfriend, friends).
In a city where student accomodation is hard to come by she found a great solution that worked for both parties.
(She did have a job that had different shift patterns so she didn't actually work nights for 8 years!).
To keep the cost down I feel you need someone who will live at your home - so like an au-pair, but they may be a student, or someone doing something else during the day.
Problem I see though is that 5 nights a week is a big commitment for someone, they wouldn't get much of a social life, so it may not appeal to many people - though I suppose it depends on the actual hours they would need to be present at your home.
If the are mon-fri or sun-thurs nights I think you could get a student who is willing to do this in exchange for free accomodation - then if its a sat night you might need to entice them with a little money!!