GreatFun - have you visited that site with the nannyshare ads?
Whereabouts in the country are you?
Going forward a nannyshare might be a better solution for you anyway than a childminder...Your children are exactly the same age as mine.
I'm paying crazy London childcare prices, but a childminder for my two DURING term time for my eldest (so only a few hours for her) was going to cost me 2.3K per month. Sharing a nanny with another family is going to cost me 1.8K per month. Ignore the figures themselves if you are outside London, but see the massive difference.
Is your 4 year old in reception? If he/she isn't, you can expect the CM costs to be even more, but the nanny costs stay the same.
Agencies don't really put together nannyshares - you have to find the family yourself. That's why that website is good, but you need to ask around other families and really make this a big project - FIND FAMILY! I'm still searching but it's only been 2 weeks.
I am putting together a nanny, a family to share her with together in exactly your time frame. It's tight but I believe I can do it.
But take Flowery's advice...she is very sensible and knows everything you need to know on HR/Employment issues.
BTW - THREAD HIJACK.
FLOWERY - A very long time ago you gave me some great advice about a colleague being paid more than me for the same job ....well, just FYI I have now left that job, managed to get a voluntary redundancy payout...but had been offered another much better job with more pay which they didn't know about. So have had 2 months at home with the kids, some money in my back pocket, and start jazzy new job in 2 weeks! Hurrah And the old work are SOOOOO sore about losing me, double ha ha!