Unfortunately, due to the post-2005 'Marston report' dumbing-down of the UAS flying training syllabus, it was impossible to grant automatic credit for UAS graduates, due to the minimal level of aerobatic flying they now achieve. In more enlightened times that might have been possible, but sadly not today.
However para 3. of the conversion table requirements in CAP 804 Part I Section 4 Part P would still apply. Your hours should be accepted - but there would still be a requirement to demonstrate prowess to an aerobatic instructor as stated in the table.