Oh no, not this again. You are working 9 hours a day, presumably 5 days a week, for 46 weeks per year (if you take off those 6 weeks she does not want to pay you). I can't imagine that if you do an employment status enquiry that HMRC will decide that you can be self employed for that. Government wants it's taxes I'm afraid and one of those taxes is Employers NI which they obtain from employers. Employers NI will probably be £1000 plus.
Being self employed is also not usually in your interest - you are under the control of someone else, who is determining your yours of work, your working days, when you can take holiday. You will be wanting some employment rights I suspect - like getting statutory sick pay if you are off on long term sick.
Please do search this section of mumsnet for further information about working as a nanny, how holiday is calculated (including looking at how it is calculated for term-time only working as if the contract does end up being for 46 weeks per year, then it may be a similar calculation method to term-time working).
Should it be of interest £60 gross per day, for 45 hours per week, 52 week year, is above National Minimum Wage. I make it £6.67 an hour, so will be fine when NMW goes up in October 2012 (to £6.19). Assuming this is your only job and you have a taxcode of 810L, then £60 a day becomes £51 take home (after deducting employee income tax and employee NI).
I wwent to see her last week and she says she gets 6 weeks holiday a yr and doesnt want to pay me for these. She also said if I take holiday not in this time she will pay.
So are you saying she wants a 46 week contract, rather than 52?
If you take holiday during the time when she is NOT on holiday - will she pay or not? I'm reading it as she would pay... but I'm not sure that is what you intended to write.
Does the holiday fit well with your children? Sounds like you may be limited to only having time off when she has time off. That does not seem very fair - there may be times when you want time off but she doesn't.
Moving forward... once you are a Childminder, would she be wanting the same or similar terms? Once you are a childminder, you call the shots, so you could well want payment when she takes holiday but not when you take holiday - so she would need to fit with what holiday you take if she didn't want to pay for a childcare place not actually used.
Once you are a childminder you would certainly want to address the fee side of things. You may have different fees depending on how long they attend - such as before/after-school only children may well be on a per-session fee rather than per-hour.
As a childminder you call the shots. As a nanny, your boss calls the shots.