romy, when the new eyfs was coming it did have an effect on the ratios, but it has all been changed (thanks goodness, there would of been no childminders for 4/5 yr olds lol)
so you can have 3 children under 5, unless they attend 10 sessions of school, ie: morning and afternoon school =full days lol when they are 4!
And you can have 3 children 5-8, and as many overs 8's as long as you canprove how you cope with them all.
I have a dd 4 and ds 6. I am allowed 3 under 5's and 1 over 5
I have an 18month old, 2 yr 9 month old, and 6 and 8 yr old! so in effect I have 1 space left BUT i am in this job because I enjoy it, not because I want to have loads of children or money (tbh, it does pay well, but it's very hard work! and I spend to much on rescources hehe) so I am not filling thats space.
my dd 4 counts now as an over 5 as she started school in Sept (when she only turned 4 end Aug!) which is another reason why I'm not filling the space, she is still very young herself.
hth