Everyone should have received an email from HM Govt to inform you about Childcare Choices.
The email links to this new website - Childcare Choices | 30 Hours Free Childcare, Tax-Free Childcare and More | Help with Costs | GOV.UK and this 'toolkit' page for England, Scotland, Wales and NI - http://transfer.23red.com/public/files/3u3k-88mqpoco.
If cms in England haven't received it check your junk inbox - if it's not there check your email address with Ofsted because that's how they are getting your contact details to keep you in the loop with this new information.
I hope that helps :D