Since the demise of the Excellence Gateway (EG) on September 30 2023, there is no official Government backed website where the old Skills for Life core curricula are available. The EG has (partially) migrated to the Education & Training Foundation (ETF) at https://www.et-foundation.co.uk/ but there is no sign of these classic documents.
I’ve only briefly skimmed through but some of these new mastery resources for L1 & L2 Functional Maths (and GCSE resits) look amazing! Includes full 33 hour (22 x 1.5 hr lessons) schemes of work, lesson plans, handouts and slides.