Ok all, Im getting myself all muddled so I cant think straight! Please help!
At the moment, I work 16 hours per week. My kids, 4 & 2 go to nursery while Im at work, and the government pay 80% (soon to be 70%) of my childcare.
I earn £400 wages, and get £660 every 4 weeks TC. My childcare costs are £450 per month on average for both kids (vary due to month lenghts, my 4 yr old grant etc). So I get £1060, minus £450 nursery, and the nursery and work are in the next town, so I spend £100 p.month on diesel to get there and back. Leaves me with £500ish(?!)
If I give up work, and pull kids out of nursery (except eldest who will do her 15 hours free), I worked out via TC calculator, I will get £450 per 4 weeks, then I will work a little 4 hour shift every week to earn an extra £100 p.month.
Now on one hand I feel like a scrote and a 'benefit grabber', but as my DH points out, Im actually saving the government money as they pay for so much childcare so I can work. My youngest will miss out on 1 1/2 days nursery that he gets now, but at the moment I feel like I never get quality time with him 
What do you wise lot think?