Dear Jack,
Not sure but i think you may have to do a course best bet as Horatio and i suggested is to contact th CAA.
Horation i think the 1500 P1 time and then do Air law and human Perf. is no longer applicable. I think all examinations are not done to JAA standards and requirements. the only thing you can get with such qualifications are a validation for a couple of years i believe but in the end you would still have to write the 12 examinations and a skill test.
cheers
AC100