Parents do not have to claim the Free Entitlement.
I have had, and will have in the future, parents entitled to the childcare element of Working Famiies Tax Credits who need to live on tight budgets. The parents have, at my suggestion, weighed up the two entiltements and have decided that it is easier for them to continue claiming the same amount from WFTC all year round than having to tell the tax office that their childcare costs vary between term and holiday time; so they do not claim Free Entitlement.
I would not want to withdraw from the Free Entitlement as some of my parents are on benefits and need and only have the free hours for their children. But if parents choose not to take Free Entitlment then I get paid my full hourly rate for 3 and 4 year olds.
I'm sure this will give you some food for thought as this makes a good alternative to dropping out of the funding all together.
BMG
