My childminder has said that she can only claim up to something like £3.90 per hour for my son once he's entitled to the 15 free hours of childcare after Easter. So she will still be charging me the difference per hour. It's not a huge amount but this is child number 3 for me and I've not had to do this before. Is it quite common? And what if she's not applying this rule to all the children in her care?