At the moment in England, those students who didn't get the equivalent of a GCSE old C grade in Y11 have to do GCSE maths in school or college because they can't leave school/college/apprenticeship until aged 18. Wales/Scotland/NI are different.
Maths A level has always been very popular, so that's the 2 ends of the market catered for.
In the 1980s, we had a middling qualification, CEE, certificate in extended education, but it died a death (GCSE? National Curriculum? don't know). We will need a recognised qualification to fill the gap, suitable for smart kids doing other A levels, and teachers to teach it.
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