I posted this on another thread. Hope it helps
My understanding is this: that the triple science pathway is vital if sciences are chosen for A level.
Double award is fine if science is not going to be taken at A level.
The report below states:
3.9.1 Most teachers felt that Triple Award was the best foundation for the study of A Level Science subjects because of its depth of coverage.
3.8.1 Most teachers said that the main disadvantage of Double Award was that it was not
the most appropriate foundation for the study of A Level Science subjects.
3.8.2 Because bridging courses were required for Double Award pupils, teachers said that
there was a lack of time to cover the syllabus, to consolidate learning and to revise.
3.8.7 The mathematical content in Double Award was said by some teachers to be
inadequate for those who progressed to the study of science at A Level.
The Transition from GCSE Science to GCE A Level Science: A Report by The Northern Ireland Council for the Curriculum,Examinations and Assessment (see link)
gtcni.openrepository.com/gtcni/bitstream/2428/6280/1/TransGCSEGCEsci.pdf