Yes (assuming the modular system) and depending on whether it was an interim (H) course or the new full (H) course, it may only be the Principles of Flight and Performance to sit.
However, under a modular scheme, you do have to have a PPL therefore. if you started ATPL(H) exams, you must have a PPL(H) and similarly for ATPL(A), you should have a PPL(A).
Cheers
Whirls