If the National Curriculum is followed, it actually covers much of the new GCSE.
I strongly believe that if you look at the GCSE being taught over 5 years, you not only cover the National Curriculum, but you also use your time well and reduce some of the stress of fitting the GCSE into two years.
The spread sheet you download cover the whole National Curriculum (with Food removed) and the whole GCSE Spec for GCSE AQA D&T.
By the side of each content part, there is a box for you to fill in where you cover that part in any given year.
Use this document to audit your KS3 work so you can see if there is any point in doing it in the first place!