I forgot to say in my earlier post (where I said ours charges 35 a day, but doesn't charge for BH or xmas week):
We have to provide nappies, wipes and baby milk; they provide milk after 1 year (if cow's milk), all food and drinks. We pay a little under 300 a month for 2 full days a week.
We are on a household income of about 37k (husband full time, me 23.5 hours) and we are still only entitled to £10 a week tax credits (childcare element); if I don't work (and therefore don't need childcare), our household income is about 23.5k and we still get £10 a week child tax credits. So do check with the hotline before planning what to do with regards to work. If I had 2 in childcare now, I'd only JUST be making more than paying out in childcare.
We get childcare vouchers through my other half's employer (can claim 55 a week - our costs are 70). It makes us 70 a month better off than if we didn't claim them, due to the tax relief on that money. I can't claim them, otherwise I definitely would; it might be worth you looking into whether you can.