P63 To use funds in the employer’s apprenticeship service account or government employer co-investment, the individual must:
P63.3 Not be undertaking another apprenticeship or be in receipt of any other DfE funding during their apprenticeship programme; this includes another apprenticeship or any other DfE funded FE/HE programme.
If this was another qualification, you might never know if a student was receiving funding elsewhere. Since it’s maths, and a requirement of the apprenticeship, I’d be nervous about doing this. If you explain that they’d have to wait, could they be persuaded to do the maths with you instead?