The DfE is currently revising the National Curriculum. The timetable for change is shown here
You will see that by Sept 2014 the review is completed and teaching becomes statutory.
Here is the response to a question to the DfE
“Academies do not have to follow the national curriculum. They can choose their own curriculum, as long as it is broad and balanced and includes English, mathematics and science.
Public Communications Unit www.education.gov.uk
When more than half of all secondary schools are Academies, do we really have a National Curriculum. Is it “National” if more than half of all secondary schools do not have to follow what is prescribed?
What are the implications for not having a National Curriculum? When considering the decades of work put into wanting, creating, and developing a National Curriculum, is it disappearing in a single year without any thought or discussion?
Will the curriculum of our schools now be defined by the big brand Academy sponsors?