Hiya
You are only not entitled to anything if your joint income exceeds £70k - So I think most of us are entitled to something!
We come under the £45-£50K PA banding and were still entitled to £1095 per year until Ky turned one, wich was about £89 per month. (Reduced to about £26.30 per month now he is over one).
If your joint income is between £25 and £50K, your basic Child Tax Credits would be around that figure, but that does not take into consideration more than one child or any childcare costs.
Hope this helps a little.