Here are some useful links that will help you find relevant information:
Ofsted: www.ofsted.gov.uk
E.Y.F.S: www.oxfordshire.gov.uk/cms/content/early-years-foundation-stage-1
O.C.C.: www.oxfordshire.gov.uk
P.L.A: www.pre-school.org.uk
Charity Commission; www.gov.uk/government/organisations/charity-commission